156338969 has 2 divisors, whose sum is σ = 156338970. Its totient is φ = 156338968.

The previous prime is 156338951. The next prime is 156338989. The reversal of 156338969 is 969833651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92929600 + 63409369 = 9640^2 + 7963^2 .

It is a cyclic number.

It is not a de Polignac number, because 156338969 - 2⁸ = 156338713 is a prime.

It is a super-2 number, since 2×156338969² = 48883746455965922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156338929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78169484 + 78169485.

It is an arithmetic number, because the mean of its divisors is an integer number (78169485).

Almost surely, 2^156338969 is an apocalyptic number.

It is an amenable number.

156338969 is a deficient number, since it is larger than the sum of its proper divisors (1).

156338969 is an equidigital number, since it uses as much as digits as its factorization.

156338969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 156338969 is about 12503.5582535533. The cubic root of 156338969 is about 538.7108813244.

The spelling of 156338969 in words is "one hundred fifty-six million, three hundred thirty-eight thousand, nine hundred sixty-nine".