99638966 has 32 divisors (see below), whose sum is σ = 175703040. Its totient is φ = 41492736.

The previous prime is 99638939. The next prime is 99638969. The reversal of 99638966 is 66983699.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99638969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106790 + ... + 107718.

It is an arithmetic number, because the mean of its divisors is an integer number (5490720).

Almost surely, 2^99638966 is an apocalyptic number.

99638966 is a deficient number, since it is larger than the sum of its proper divisors (76064074).

99638966 is a wasteful number, since it uses less digits than its factorization.

99638966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 3779136, while the sum is 56.

The square root of 99638966 is about 9981.9319773278. The cubic root of 99638966 is about 463.5996193149.

The spelling of 99638966 in words is "ninety-nine million, six hundred thirty-eight thousand, nine hundred sixty-six".