231938977 has 4 divisors (see below), whose sum is σ = 238207636. Its totient is φ = 225670320.

The previous prime is 231938933. The next prime is 231938981. The reversal of 231938977 is 779839132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145057936 + 86881041 = 12044^2 + 9321^2 .

It is a cyclic number.

It is not a de Polignac number, because 231938977 - 2²⁷ = 97721249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231938977.

It is not an unprimeable number, because it can be changed into a prime (231938477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134274 + ... + 3134347.

It is an arithmetic number, because the mean of its divisors is an integer number (59551909).

Almost surely, 2^231938977 is an apocalyptic number.

It is an amenable number.

231938977 is a deficient number, since it is larger than the sum of its proper divisors (6268659).

231938977 is an equidigital number, since it uses as much as digits as its factorization.

231938977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6268658.

The product of its digits is 571536, while the sum is 49.

The square root of 231938977 is about 15229.5429018733. The cubic root of 231938977 is about 614.4094862780.

The spelling of 231938977 in words is "two hundred thirty-one million, nine hundred thirty-eight thousand, nine hundred seventy-seven".