63873531 has 12 divisors (see below), whose sum is σ = 94512600. Its totient is φ = 41543520.

The previous prime is 63873521. The next prime is 63873559. The reversal of 63873531 is 13537836.

It is not a de Polignac number, because 63873531 - 2¹⁴ = 63857147 is a prime.

It is a super-2 number, since 2×63873531² = 8159655924815922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63873521) 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 in 11 ways as a sum of consecutive naturals, for example, 86181 + ... + 86918.

It is an arithmetic number, because the mean of its divisors is an integer number (7876050).

Almost surely, 2^63873531 is an apocalyptic number.

63873531 is a deficient number, since it is larger than the sum of its proper divisors (30639069).

63873531 is a wasteful number, since it uses less digits than its factorization.

63873531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173146 (or 173143 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 63873531 is about 7992.0917787523. The cubic root of 63873531 is about 399.7363491755.

The spelling of 63873531 in words is "sixty-three million, eight hundred seventy-three thousand, five hundred thirty-one".