231695969 has 2 divisors, whose sum is σ = 231695970. Its totient is φ = 231695968.

The previous prime is 231695963. The next prime is 231695987. The reversal of 231695969 is 969596132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125708944 + 105987025 = 11212^2 + 10295^2 .

It is a cyclic number.

It is not a de Polignac number, because 231695969 - 2²⁰ = 230647393 is a prime.

It is a super-2 number, since 2×231695969² = 107366044101697922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231695963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115847984 + 115847985.

It is an arithmetic number, because the mean of its divisors is an integer number (115847985).

Almost surely, 2^231695969 is an apocalyptic number.

It is an amenable number.

231695969 is a deficient number, since it is larger than the sum of its proper divisors (1).

231695969 is an equidigital number, since it uses as much as digits as its factorization.

231695969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 50.

The square root of 231695969 is about 15221.5626333173. The cubic root of 231695969 is about 614.1948341359.

The spelling of 231695969 in words is "two hundred thirty-one million, six hundred ninety-five thousand, nine hundred sixty-nine".