99991092 has 24 divisors (see below), whose sum is σ = 235720576. Its totient is φ = 32986368.

The previous prime is 99991081. The next prime is 99991103. The reversal of 99991092 is 29019999.

It is an interprime number because it is at equal distance from previous prime (99991081) and next prime (99991103).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 41788 + ... + 44115.

Almost surely, 2^99991092 is an apocalyptic number.

It is an amenable number.

99991092 is an abundant number, since it is smaller than the sum of its proper divisors (135729484).

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

99991092 is a wasteful number, since it uses less digits than its factorization.

99991092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86007 (or 86005 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 48.

The square root of 99991092 is about 9999.5545900805. The cubic root of 99991092 is about 464.1451005276.

The spelling of 99991092 in words is "ninety-nine million, nine hundred ninety-one thousand, ninety-two".