99117090 has 48 divisors (see below), whose sum is σ = 263999736. Its totient is φ = 25785600.

The previous prime is 99117077. The next prime is 99117121. The reversal of 99117090 is 9071199.

It can be written as a sum of positive squares in 4 ways, for example, as 24000201 + 75116889 = 4899^2 + 8667^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9741 + ... + 17120.

Almost surely, 2^99117090 is an apocalyptic number.

99117090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99117090 is an abundant number, since it is smaller than the sum of its proper divisors (164882646).

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

99117090 is a wasteful number, since it uses less digits than its factorization.

99117090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26915 (or 26912 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 99117090 is about 9955.7566261937. The cubic root of 99117090 is about 462.7888081723.

It can be divided in two parts, 991 and 17090, that added together give a palindrome (18081).

The spelling of 99117090 in words is "ninety-nine million, one hundred seventeen thousand, ninety".