917894634 has 48 divisors (see below), whose sum is σ = 1997847936. Its totient is φ = 280921600.

The previous prime is 917894629. The next prime is 917894639. The reversal of 917894634 is 436498719.

It is an interprime number because it is at equal distance from previous prime (917894629) and next prime (917894639).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (917894639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64639 + ... + 77549.

It is an arithmetic number, because the mean of its divisors is an integer number (41621832).

Almost surely, 2^917894634 is an apocalyptic number.

917894634 is an abundant number, since it is smaller than the sum of its proper divisors (1079953302).

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

917894634 is a wasteful number, since it uses less digits than its factorization.

917894634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991 (or 12974 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 917894634 is about 30296.7759670893. The cubic root of 917894634 is about 971.8463554162.

The spelling of 917894634 in words is "nine hundred seventeen million, eight hundred ninety-four thousand, six hundred thirty-four".