991704465 has 80 divisors (see below), whose sum is σ = 1851683328. Its totient is φ = 507371904.

The previous prime is 991704457. The next prime is 991704481. The reversal of 991704465 is 564407199.

991704465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 991704465 - 2³ = 991704457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 991704465.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1008364 + ... + 1009346.

Almost surely, 2^991704465 is an apocalyptic number.

It is an amenable number.

991704465 is a deficient number, since it is larger than the sum of its proper divisors (859978863).

991704465 is a wasteful number, since it uses less digits than its factorization.

991704465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 991704465 is about 31491.3395237484. The cubic root of 991704465 is about 997.2271400208.

The spelling of 991704465 in words is "nine hundred ninety-one million, seven hundred four thousand, four hundred sixty-five".