99181086 has 16 divisors (see below), whose sum is σ = 199042704. Its totient is φ = 32946944.

The previous prime is 99181079. The next prime is 99181097. The reversal of 99181086 is 68018199.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26451 + ... + 29966.

It is an arithmetic number, because the mean of its divisors is an integer number (12440169).

Almost surely, 2^99181086 is an apocalyptic number.

99181086 is an abundant number, since it is smaller than the sum of its proper divisors (99861618).

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

99181086 is a wasteful number, since it uses less digits than its factorization.

99181086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56715.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 99181086 is about 9958.9701274780. The cubic root of 99181086 is about 462.8883882439. Note that the first 3 decimals are identical.

The spelling of 99181086 in words is "ninety-nine million, one hundred eighty-one thousand, eighty-six".