63813922 has 4 divisors (see below), whose sum is σ = 95720886. Its totient is φ = 31906960.

The previous prime is 63813887. The next prime is 63813923. The reversal of 63813922 is 22931836.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 12103441 = 7191^2 + 3479^2 .

It is not an unprimeable number, because it can be changed into a prime (63813923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15953479 + ... + 15953482.

Almost surely, 2^63813922 is an apocalyptic number.

63813922 is a deficient number, since it is larger than the sum of its proper divisors (31906964).

63813922 is a wasteful number, since it uses less digits than its factorization.

63813922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31906963.

The product of its digits is 15552, while the sum is 34.

The square root of 63813922 is about 7988.3616593141. The cubic root of 63813922 is about 399.6119611864.

The spelling of 63813922 in words is "sixty-three million, eight hundred thirteen thousand, nine hundred twenty-two".