231972959 has 2 divisors, whose sum is σ = 231972960. Its totient is φ = 231972958.

The previous prime is 231972931. The next prime is 231972967. The reversal of 231972959 is 959279132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231972959 is a prime.

It is a super-2 number, since 2×231972959² = 107622907414431362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231972929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115986479 + 115986480.

It is an arithmetic number, because the mean of its divisors is an integer number (115986480).

Almost surely, 2^231972959 is an apocalyptic number.

231972959 is a deficient number, since it is larger than the sum of its proper divisors (1).

231972959 is an equidigital number, since it uses as much as digits as its factorization.

231972959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 231972959 is about 15230.6585215479. The cubic root of 231972959 is about 614.4394910719.

The spelling of 231972959 in words is "two hundred thirty-one million, nine hundred seventy-two thousand, nine hundred fifty-nine".