99990992 has 20 divisors (see below), whose sum is σ = 195020256. Its totient is φ = 49663200.

The previous prime is 99990973. The next prime is 99991009. The reversal of 99990992 is 29909999.

It is a happy number.

It is a super-2 number, since 2×99990992² = 19996396962288128, 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 3 ways as a sum of consecutive naturals, for example, 18278 + ... + 23109.

Almost surely, 2^99990992 is an apocalyptic number.

It is an amenable number.

99990992 is a deficient number, since it is larger than the sum of its proper divisors (95029264).

99990992 is a wasteful number, since it uses less digits than its factorization.

99990992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41546 (or 41540 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 56.

The square root of 99990992 is about 9999.5495898565. The cubic root of 99990992 is about 464.1449457987.

It can be divided in two parts, 999909 and 92, that added together give a palindrome (1000001).

The spelling of 99990992 in words is "ninety-nine million, nine hundred ninety thousand, nine hundred ninety-two".