99972318 has 16 divisors (see below), whose sum is σ = 200042640. Its totient is φ = 33307776.

The previous prime is 99972317. The next prime is 99972403. The reversal of 99972318 is 81327999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99972311) 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, 21846 + ... + 26022.

It is an arithmetic number, because the mean of its divisors is an integer number (12502665).

Almost surely, 2^99972318 is an apocalyptic number.

99972318 is an abundant number, since it is smaller than the sum of its proper divisors (100070322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99972318 is a wasteful number, since it uses less digits than its factorization.

99972318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8171.

The product of its digits is 244944, while the sum is 48.

The square root of 99972318 is about 9998.6158042001. The cubic root of 99972318 is about 464.1160499213.

The spelling of 99972318 in words is "ninety-nine million, nine hundred seventy-two thousand, three hundred eighteen".