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993321289 = 315172
BaseRepresentation
bin111011001101001…
…110000101001001
32120020002221122101
4323031032011021
54013242240124
6242322153401
733421043302
oct7315160511
92506087571
10993321289
1146a781a94
122387b2861
1312aa3c29c
1495ccd7a9
155c312644
hex3b34e149

993321289 has 3 divisors (see below), whose sum is σ = 993352807. Its totient is φ = 993289772.

The previous prime is 993321269. The next prime is 993321331. The reversal of 993321289 is 982123399.

The square root of 993321289 is 31517.

It is a perfect power (a square), and thus also a powerful number.

993321289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 869778064 = 11115^2 + 29492^2 .

It is not a de Polignac number, because 993321289 - 29 = 993320777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993321209) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15759 + ... + 47275.

Almost surely, 2993321289 is an apocalyptic number.

993321289 is the 31517-th square number.

993321289 is the 15759-th centered octagonal number.

It is an amenable number.

993321289 is a deficient number, since it is larger than the sum of its proper divisors (31518).

993321289 is an frugal number, since it uses more digits than its factorization.

993321289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63034 (or 31517 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The cubic root of 993321289 is about 997.7687883973.

The spelling of 993321289 in words is "nine hundred ninety-three million, three hundred twenty-one thousand, two hundred eighty-nine".

Divisors: 1 31517 993321289