99431286 has 16 divisors (see below), whose sum is σ = 202615344. Its totient is φ = 32518304.

The previous prime is 99431263. The next prime is 99431309. The reversal of 99431286 is 68213499.

It is an interprime number because it is at equal distance from previous prime (99431263) and next prime (99431309).

It is a super-2 number, since 2×99431286² = 19773161271227592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156021 + ... + 156656.

It is an arithmetic number, because the mean of its divisors is an integer number (12663459).

Almost surely, 2^99431286 is an apocalyptic number.

99431286 is an abundant number, since it is smaller than the sum of its proper divisors (103184058).

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

99431286 is a wasteful number, since it uses less digits than its factorization.

99431286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312735.

The product of its digits is 93312, while the sum is 42.

The square root of 99431286 is about 9971.5237551740. The cubic root of 99431286 is about 463.2772978257.

The spelling of 99431286 in words is "ninety-nine million, four hundred thirty-one thousand, two hundred eighty-six".