917979132 has 120 divisors (see below), whose sum is σ = 2527263872. Its totient is φ = 259308000.

The previous prime is 917979103. The next prime is 917979169. The reversal of 917979132 is 231979719.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4350507 + ... + 4350717.

Almost surely, 2^917979132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 917979132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263631936).

917979132 is an abundant number, since it is smaller than the sum of its proper divisors (1609284740).

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

917979132 is a wasteful number, since it uses less digits than its factorization.

917979132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 374 counting only the distinct ones).

The product of its digits is 214326, while the sum is 48.

The square root of 917979132 is about 30298.1704398137. The cubic root of 917979132 is about 971.8761760334.

The spelling of 917979132 in words is "nine hundred seventeen million, nine hundred seventy-nine thousand, one hundred thirty-two".