73649631 has 16 divisors (see below), whose sum is σ = 108885888. Its totient is φ = 43903200.

The previous prime is 73649617. The next prime is 73649651. The reversal of 73649631 is 13694637.

It is not a de Polignac number, because 73649631 - 2⁵ = 73649599 is a prime.

It is a super-2 number, since 2×73649631² = 10848536292872322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73649631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73649651) 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 15 ways as a sum of consecutive naturals, for example, 16281 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (6805368).

Almost surely, 2^73649631 is an apocalyptic number.

73649631 is a deficient number, since it is larger than the sum of its proper divisors (35236257).

73649631 is a wasteful number, since it uses less digits than its factorization.

73649631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36662.

The product of its digits is 81648, while the sum is 39.

The square root of 73649631 is about 8581.9363199688. The cubic root of 73649631 is about 419.1699991611.

The spelling of 73649631 in words is "seventy-three million, six hundred forty-nine thousand, six hundred thirty-one".