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993921289 is a prime number
BaseRepresentation
bin111011001111100…
…000100100001001
32120021020102200121
4323033200210021
54013420440124
6242343103241
733426122464
oct7317404411
92507212617
10993921289
11470051859
12238a41b21
1312abbc40a
14960082db
155c3d02e4
hex3b3e0909

993921289 has 2 divisors, whose sum is σ = 993921290. Its totient is φ = 993921288.

The previous prime is 993921259. The next prime is 993921301. The reversal of 993921289 is 982129399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788486400 + 205434889 = 28080^2 + 14333^2 .

It is a cyclic number.

It is not a de Polignac number, because 993921289 - 27 = 993921161 is a prime.

It is not a weakly prime, because it can be changed into another prime (993921239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496960644 + 496960645.

It is an arithmetic number, because the mean of its divisors is an integer number (496960645).

Almost surely, 2993921289 is an apocalyptic number.

It is an amenable number.

993921289 is a deficient number, since it is larger than the sum of its proper divisors (1).

993921289 is an equidigital number, since it uses as much as digits as its factorization.

993921289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 993921289 is about 31526.5172354956. The cubic root of 993921289 is about 997.9696434422.

The spelling of 993921289 in words is "nine hundred ninety-three million, nine hundred twenty-one thousand, two hundred eighty-nine".