231688463 has 2 divisors, whose sum is σ = 231688464. Its totient is φ = 231688462.

The previous prime is 231688447. The next prime is 231688517. The reversal of 231688463 is 364886132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231688463 - 2⁴ = 231688447 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231688463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231688423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115844231 + 115844232.

It is an arithmetic number, because the mean of its divisors is an integer number (115844232).

Almost surely, 2^231688463 is an apocalyptic number.

231688463 is a deficient number, since it is larger than the sum of its proper divisors (1).

231688463 is an equidigital number, since it uses as much as digits as its factorization.

231688463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 231688463 is about 15221.3160731916. The cubic root of 231688463 is about 614.1882015989.

The spelling of 231688463 in words is "two hundred thirty-one million, six hundred eighty-eight thousand, four hundred sixty-three".