231873399 has 12 divisors (see below), whose sum is σ = 339928056. Its totient is φ = 152274672.

The previous prime is 231873379. The next prime is 231873403. The reversal of 231873399 is 993378132.

231873399 is a `hidden beast` number, since 231 + 87 + 339 + 9 = 666.

It is not a de Polignac number, because 231873399 - 2⁹ = 231872887 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231873349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191664 + ... + 192869.

It is an arithmetic number, because the mean of its divisors is an integer number (28327338).

Almost surely, 2^231873399 is an apocalyptic number.

231873399 is a deficient number, since it is larger than the sum of its proper divisors (108054657).

231873399 is a wasteful number, since it uses less digits than its factorization.

231873399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384606 (or 384603 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 231873399 is about 15227.3897631866. The cubic root of 231873399 is about 614.3515751502.

The spelling of 231873399 in words is "two hundred thirty-one million, eight hundred seventy-three thousand, three hundred ninety-nine".