99157986 has 16 divisors (see below), whose sum is σ = 220351200. Its totient is φ = 33052644.

The previous prime is 99157969. The next prime is 99157987. The reversal of 99157986 is 68975199.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1836259 = 99157986 / (9 + 9 + 1 + 5 + 7 + 9 + 8 + 6).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99157987) 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, 918076 + ... + 918183.

It is an arithmetic number, because the mean of its divisors is an integer number (13771950).

Almost surely, 2^99157986 is an apocalyptic number.

99157986 is an abundant number, since it is smaller than the sum of its proper divisors (121193214).

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

99157986 is a wasteful number, since it uses less digits than its factorization.

99157986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836270 (or 1836264 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 99157986 is about 9957.8103014669. The cubic root of 99157986 is about 462.8524487570.

The spelling of 99157986 in words is "ninety-nine million, one hundred fifty-seven thousand, nine hundred eighty-six".