231687863 has 8 divisors (see below), whose sum is σ = 258128640. Its totient is φ = 206143480.

The previous prime is 231687853. The next prime is 231687871. The reversal of 231687863 is 368786132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231687863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231687853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223553 + ... + 224586.

It is an arithmetic number, because the mean of its divisors is an integer number (32266080).

Almost surely, 2^231687863 is an apocalyptic number.

231687863 is a deficient number, since it is larger than the sum of its proper divisors (26440777).

231687863 is a wasteful number, since it uses less digits than its factorization.

231687863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448197.

The product of its digits is 290304, while the sum is 44.

The square root of 231687863 is about 15221.2963639764. The cubic root of 231687863 is about 614.1876714139.

The spelling of 231687863 in words is "two hundred thirty-one million, six hundred eighty-seven thousand, eight hundred sixty-three".