99055990 has 32 divisors (see below), whose sum is σ = 195416064. Its totient is φ = 35852640.

The previous prime is 99055973. The next prime is 99055997. The reversal of 99055990 is 9955099.

It is a self number, because there is not a number n which added to its sum of digits gives 99055990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99055997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22987 + ... + 26953.

It is an arithmetic number, because the mean of its divisors is an integer number (6106752).

Almost surely, 2^99055990 is an apocalyptic number.

99055990 is a deficient number, since it is larger than the sum of its proper divisors (96360074).

99055990 is a wasteful number, since it uses less digits than its factorization.

99055990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212.

The product of its (nonzero) digits is 164025, while the sum is 46.

The square root of 99055990 is about 9952.6875767302. The cubic root of 99055990 is about 462.6936943750.

The spelling of 99055990 in words is "ninety-nine million, fifty-five thousand, nine hundred ninety".