913991812 has 24 divisors (see below), whose sum is σ = 1618081920. Its totient is φ = 451695360.

The previous prime is 913991809. The next prime is 913991831. The reversal of 913991812 is 218199319.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585489 + ... + 587047.

It is an arithmetic number, because the mean of its divisors is an integer number (67420080).

Almost surely, 2^913991812 is an apocalyptic number.

It is an amenable number.

913991812 is a deficient number, since it is larger than the sum of its proper divisors (704090108).

913991812 is a wasteful number, since it uses less digits than its factorization.

913991812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171 (or 3169 counting only the distinct ones).

The product of its digits is 34992, while the sum is 43.

The square root of 913991812 is about 30232.2974978747. The cubic root of 913991812 is about 970.4669916328.

The spelling of 913991812 in words is "nine hundred thirteen million, nine hundred ninety-one thousand, eight hundred twelve".