99773631 has 24 divisors (see below), whose sum is σ = 148152576. Its totient is φ = 64668240.

The previous prime is 99773627. The next prime is 99773647. The reversal of 99773631 is 13637799.

99773631 is a `hidden beast` number, since 9 + 9 + 7 + 7 + 3 + 631 = 666.

It is not a de Polignac number, because 99773631 - 2² = 99773627 is a prime.

It is a super-2 number, since 2×99773631² = 19909554885848322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99773651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109066 + ... + 109976.

It is an arithmetic number, because the mean of its divisors is an integer number (6173024).

Almost surely, 2^99773631 is an apocalyptic number.

99773631 is a deficient number, since it is larger than the sum of its proper divisors (48378945).

99773631 is a wasteful number, since it uses less digits than its factorization.

99773631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 99773631 is about 9988.6751373743. The cubic root of 99773631 is about 463.8083814780.

The spelling of 99773631 in words is "ninety-nine million, seven hundred seventy-three thousand, six hundred thirty-one".