231879399 has 32 divisors (see below), whose sum is σ = 331568640. Its totient is φ = 143814528.

The previous prime is 231879391. The next prime is 231879421. The reversal of 231879399 is 993978132.

It is a happy number.

It is not a de Polignac number, because 231879399 - 2³ = 231879391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231879391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595897 + ... + 596285.

It is an arithmetic number, because the mean of its divisors is an integer number (10361520).

Almost surely, 2^231879399 is an apocalyptic number.

231879399 is a deficient number, since it is larger than the sum of its proper divisors (99689241).

231879399 is a wasteful number, since it uses less digits than its factorization.

231879399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 734832, while the sum is 51.

The square root of 231879399 is about 15227.5867753233. The cubic root of 231879399 is about 614.3568741304.

The spelling of 231879399 in words is "two hundred thirty-one million, eight hundred seventy-nine thousand, three hundred ninety-nine".