993861121 has 4 divisors (see below), whose sum is σ = 1084212144. Its totient is φ = 903510100.

The previous prime is 993861097. The next prime is 993861133. The reversal of 993861121 is 121168399.

993861121 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 993861121 - 2⁷ = 993860993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993861721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45175495 + ... + 45175516.

It is an arithmetic number, because the mean of its divisors is an integer number (271053036).

Almost surely, 2^993861121 is an apocalyptic number.

It is an amenable number.

993861121 is a deficient number, since it is larger than the sum of its proper divisors (90351023).

993861121 is a wasteful number, since it uses less digits than its factorization.

993861121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90351022.

The product of its digits is 23328, while the sum is 40.

The square root of 993861121 is about 31525.5629767337. The cubic root of 993861121 is about 997.9495053455.

The spelling of 993861121 in words is "nine hundred ninety-three million, eight hundred sixty-one thousand, one hundred twenty-one".