99861392 has 20 divisors (see below), whose sum is σ = 196655196. Its totient is φ = 49111680.

The previous prime is 99861389. The next prime is 99861401. The reversal of 99861392 is 29316899.

It can be written as a sum of positive squares in 2 ways, for example, as 39891856 + 59969536 = 6316^2 + 7744^2 .

It is a super-2 number, since 2×99861392² = 19944595224355328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50183 + ... + 52134.

Almost surely, 2^99861392 is an apocalyptic number.

It is an amenable number.

99861392 is a deficient number, since it is larger than the sum of its proper divisors (96793804).

99861392 is a wasteful number, since it uses less digits than its factorization.

99861392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102386 (or 102380 counting only the distinct ones).

The product of its digits is 209952, while the sum is 47.

The square root of 99861392 is about 9993.0671968120. The cubic root of 99861392 is about 463.9443304199.

The spelling of 99861392 in words is "ninety-nine million, eight hundred sixty-one thousand, three hundred ninety-two".