63685231 has 2 divisors, whose sum is σ = 63685232. Its totient is φ = 63685230.

The previous prime is 63685217. The next prime is 63685301. The reversal of 63685231 is 13258636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63685231 - 2⁵ = 63685199 is a prime.

It is a super-2 number, since 2×63685231² = 8111617295046722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63685201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31842615 + 31842616.

It is an arithmetic number, because the mean of its divisors is an integer number (31842616).

Almost surely, 2^63685231 is an apocalyptic number.

63685231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685231 is an equidigital number, since it uses as much as digits as its factorization.

63685231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 63685231 is about 7980.3026884950. The cubic root of 63685231 is about 399.3431532212.

The spelling of 63685231 in words is "sixty-three million, six hundred eighty-five thousand, two hundred thirty-one".