990113311 has 4 divisors (see below), whose sum is σ = 1080123624. Its totient is φ = 900103000.

The previous prime is 990113287. The next prime is 990113321. The reversal of 990113311 is 113311099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990113311 - 2¹³ = 990105119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990113311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990113321) 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, 45005140 + ... + 45005161.

It is an arithmetic number, because the mean of its divisors is an integer number (270030906).

Almost surely, 2^990113311 is an apocalyptic number.

990113311 is a deficient number, since it is larger than the sum of its proper divisors (90010313).

990113311 is a wasteful number, since it uses less digits than its factorization.

990113311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90010312.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 990113311 is about 31466.0660235753. The cubic root of 990113311 is about 996.6935162147.

The spelling of 990113311 in words is "nine hundred ninety million, one hundred thirteen thousand, three hundred eleven".