990113601 has 4 divisors (see below), whose sum is σ = 1320151472. Its totient is φ = 660075732.

The previous prime is 990113587. The next prime is 990113603. The reversal of 990113601 is 106311099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-990113601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990113603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165018931 + ... + 165018936.

It is an arithmetic number, because the mean of its divisors is an integer number (330037868).

Almost surely, 2^990113601 is an apocalyptic number.

It is an amenable number.

990113601 is a deficient number, since it is larger than the sum of its proper divisors (330037871).

990113601 is a wasteful number, since it uses less digits than its factorization.

990113601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330037870.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 990113601 is about 31466.0706317138. The cubic root of 990113601 is about 996.6936135238.

The spelling of 990113601 in words is "nine hundred ninety million, one hundred thirteen thousand, six hundred one".