917130520 has 32 divisors (see below), whose sum is σ = 2153265120. Its totient is φ = 350901760.

The previous prime is 917130509. The next prime is 917130523. The reversal of 917130520 is 25031719.

It is a super-2 number, since 2×917130520² = 1682256781430940800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917130523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497521 + ... + 499360.

It is an arithmetic number, because the mean of its divisors is an integer number (67289535).

Almost surely, 2^917130520 is an apocalyptic number.

It is an amenable number.

917130520 is an abundant number, since it is smaller than the sum of its proper divisors (1236134600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

917130520 is a wasteful number, since it uses less digits than its factorization.

917130520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996915 (or 996911 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 917130520 is about 30284.1628578371. The cubic root of 917130520 is about 971.5766049326.

The spelling of 917130520 in words is "nine hundred seventeen million, one hundred thirty thousand, five hundred twenty".