991610792 has 16 divisors (see below), whose sum is σ = 1864055700. Its totient is φ = 494529280.

The previous prime is 991610791. The next prime is 991610801. The reversal of 991610792 is 297016199.

It can be written as a sum of positive squares in 2 ways, for example, as 975562756 + 16048036 = 31234^2 + 4006^2 .

It is not an unprimeable number, because it can be changed into a prime (991610791) 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, 156209 + ... + 162432.

Almost surely, 2^991610792 is an apocalyptic number.

It is an amenable number.

991610792 is a deficient number, since it is larger than the sum of its proper divisors (872444908).

991610792 is a wasteful number, since it uses less digits than its factorization.

991610792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319036 (or 319032 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 991610792 is about 31489.8522067030. The cubic root of 991610792 is about 997.1957408145.

It can be divided in two parts, 9916107 and 92, that added together give a palindrome (9916199).

The spelling of 991610792 in words is "nine hundred ninety-one million, six hundred ten thousand, seven hundred ninety-two".