63904031 has 4 divisors (see below), whose sum is σ = 63966000. Its totient is φ = 63842064.

The previous prime is 63904019. The next prime is 63904033. The reversal of 63904031 is 13040936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63904031 - 2⁶ = 63903967 is a prime.

It is a super-2 number, since 2×63904031² = 8167450356097922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63904033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29411 + ... + 31508.

It is an arithmetic number, because the mean of its divisors is an integer number (15991500).

Almost surely, 2^63904031 is an apocalyptic number.

63904031 is a deficient number, since it is larger than the sum of its proper divisors (61969).

63904031 is a wasteful number, since it uses less digits than its factorization.

63904031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61968.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 63904031 is about 7993.9996872654. Note that the first 3 decimals coincide. The cubic root of 63904031 is about 399.7999645646.

Adding to 63904031 its reverse (13040936), we get a palindrome (76944967).

The spelling of 63904031 in words is "sixty-three million, nine hundred four thousand, thirty-one".