231132977 has 2 divisors, whose sum is σ = 231132978. Its totient is φ = 231132976.

The previous prime is 231132961. The next prime is 231133009. The reversal of 231132977 is 779231132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230553856 + 579121 = 15184^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 231132977 - 2⁴ = 231132961 is a prime.

It is not a weakly prime, because it can be changed into another prime (231132917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566488 + 115566489.

It is an arithmetic number, because the mean of its divisors is an integer number (115566489).

Almost surely, 2^231132977 is an apocalyptic number.

It is an amenable number.

231132977 is a deficient number, since it is larger than the sum of its proper divisors (1).

231132977 is an equidigital number, since it uses as much as digits as its factorization.

231132977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 231132977 is about 15203.0581463073. The cubic root of 231132977 is about 613.6969586499.

The spelling of 231132977 in words is "two hundred thirty-one million, one hundred thirty-two thousand, nine hundred seventy-seven".