63895631 has 2 divisors, whose sum is σ = 63895632. Its totient is φ = 63895630.

The previous prime is 63895627. The next prime is 63895693. The reversal of 63895631 is 13659836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63895631 - 2² = 63895627 is a prime.

It is a super-2 number, since 2×63895631² = 8165303321776322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63895621) 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 as a sum of consecutive naturals, namely, 31947815 + 31947816.

It is an arithmetic number, because the mean of its divisors is an integer number (31947816).

Almost surely, 2^63895631 is an apocalyptic number.

63895631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63895631 is an equidigital number, since it uses as much as digits as its factorization.

63895631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 63895631 is about 7993.4742759328. The cubic root of 63895631 is about 399.7824462807.

It can be divided in two parts, 638 and 95631, that added together give a palindrome (96269).

The spelling of 63895631 in words is "sixty-three million, eight hundred ninety-five thousand, six hundred thirty-one".