99813390 has 32 divisors (see below), whose sum is σ = 239815296. Its totient is φ = 26587680.

The previous prime is 99813379. The next prime is 99813391. The reversal of 99813390 is 9331899.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99813391) 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, 50725 + ... + 52655.

It is an arithmetic number, because the mean of its divisors is an integer number (7494228).

Almost surely, 2^99813390 is an apocalyptic number.

99813390 is an abundant number, since it is smaller than the sum of its proper divisors (140001906).

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

99813390 is a wasteful number, since it uses less digits than its factorization.

99813390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 99813390 is about 9990.6651430223. The cubic root of 99813390 is about 463.8699812825.

The spelling of 99813390 in words is "ninety-nine million, eight hundred thirteen thousand, three hundred ninety".