99090290 has 16 divisors (see below), whose sum is σ = 192082968. Its totient is φ = 36587136.

The previous prime is 99090289. The next prime is 99090307. The reversal of 99090290 is 9209099.

It can be written as a sum of positive squares in 4 ways, for example, as 89548369 + 9541921 = 9463^2 + 3089^2 .

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, 380987 + ... + 381246.

Almost surely, 2^99090290 is an apocalyptic number.

99090290 is a deficient number, since it is larger than the sum of its proper divisors (92992678).

99090290 is a wasteful number, since it uses less digits than its factorization.

99090290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762253.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 99090290 is about 9954.4105802403. The cubic root of 99090290 is about 462.7470936773.

The spelling of 99090290 in words is "ninety-nine million, ninety thousand, two hundred ninety".