989892313 has 2 divisors, whose sum is σ = 989892314. Its totient is φ = 989892312.

The previous prime is 989892307. The next prime is 989892359. The reversal of 989892313 is 313298989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647346249 + 342546064 = 25443^2 + 18508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989892313 is a prime.

It is not a weakly prime, because it can be changed into another prime (989892373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494946156 + 494946157.

It is an arithmetic number, because the mean of its divisors is an integer number (494946157).

Almost surely, 2^989892313 is an apocalyptic number.

It is an amenable number.

989892313 is a deficient number, since it is larger than the sum of its proper divisors (1).

989892313 is an equidigital number, since it uses as much as digits as its factorization.

989892313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 989892313 is about 31462.5541398024. The cubic root of 989892313 is about 996.6193551190.

The spelling of 989892313 in words is "nine hundred eighty-nine million, eight hundred ninety-two thousand, three hundred thirteen".