99640874 has 8 divisors (see below), whose sum is σ = 149512068. Its totient is φ = 49803520.

The previous prime is 99640873. The next prime is 99640909. The reversal of 99640874 is 47804699.

It can be written as a sum of positive squares in 2 ways, for example, as 73702225 + 25938649 = 8585^2 + 5093^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99640873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034 + ... + 14154.

Almost surely, 2^99640874 is an apocalyptic number.

99640874 is a deficient number, since it is larger than the sum of its proper divisors (49871194).

99640874 is a wasteful number, since it uses less digits than its factorization.

99640874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16920.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 99640874 is about 9982.0275495512. The cubic root of 99640874 is about 463.6025784732.

The spelling of 99640874 in words is "ninety-nine million, six hundred forty thousand, eight hundred seventy-four".