73640631 has 8 divisors (see below), whose sum is σ = 99056880. Its totient is φ = 48659072.

The previous prime is 73640627. The next prime is 73640663. The reversal of 73640631 is 13604637.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73640631 - 2² = 73640627 is a prime.

It is a super-2 number, since 2×73640631² = 10845885068156322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73640131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108276 + ... + 108953.

It is an arithmetic number, because the mean of its divisors is an integer number (12382110).

Almost surely, 2^73640631 is an apocalyptic number.

73640631 is a deficient number, since it is larger than the sum of its proper divisors (25416249).

73640631 is a wasteful number, since it uses less digits than its factorization.

73640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217345.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 73640631 is about 8581.4119467603. The cubic root of 73640631 is about 419.1529242456.

The spelling of 73640631 in words is "seventy-three million, six hundred forty thousand, six hundred thirty-one".