990332113 has 4 divisors (see below), whose sum is σ = 999096228. Its totient is φ = 981568000.

The previous prime is 990332039. The next prime is 990332129. The reversal of 990332113 is 311233099.

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

It can be written as a sum of positive squares in 2 ways, for example, as 544615569 + 445716544 = 23337^2 + 21112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990332113 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990332143) 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, 4381888 + ... + 4382113.

It is an arithmetic number, because the mean of its divisors is an integer number (249774057).

Almost surely, 2^990332113 is an apocalyptic number.

It is an amenable number.

990332113 is a deficient number, since it is larger than the sum of its proper divisors (8764115).

990332113 is a wasteful number, since it uses less digits than its factorization.

990332113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764114.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 990332113 is about 31469.5426245759. The cubic root of 990332113 is about 996.7669295201.

The spelling of 990332113 in words is "nine hundred ninety million, three hundred thirty-two thousand, one hundred thirteen".