63884431 has 4 divisors (see below), whose sum is σ = 68798632. Its totient is φ = 58970232.

The previous prime is 63884423. The next prime is 63884503. The reversal of 63884431 is 13448836.

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 63884431 - 2³ = 63884423 is a prime.

It is a super-2 number, since 2×63884431² = 8162441048387522, 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 (63884531) 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, 2457081 + ... + 2457106.

It is an arithmetic number, because the mean of its divisors is an integer number (17199658).

Almost surely, 2^63884431 is an apocalyptic number.

63884431 is a deficient number, since it is larger than the sum of its proper divisors (4914201).

63884431 is a wasteful number, since it uses less digits than its factorization.

63884431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914200.

The product of its digits is 55296, while the sum is 37.

The square root of 63884431 is about 7992.7736737631. The cubic root of 63884431 is about 399.7590861805.

The spelling of 63884431 in words is "sixty-three million, eight hundred eighty-four thousand, four hundred thirty-one".