917991464 has 24 divisors (see below), whose sum is σ = 1854260730. Its totient is φ = 423545760.

The previous prime is 917991463. The next prime is 917991467. The reversal of 917991464 is 464199719.

It is a happy number.

917991464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 882684100 + 35307364 = 29710^2 + 5942^2 .

It is not an unprimeable number, because it can be changed into a prime (917991463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307499 + ... + 310469.

Almost surely, 2^917991464 is an apocalyptic number.

It is an amenable number.

917991464 is an abundant number, since it is smaller than the sum of its proper divisors (936269266).

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

917991464 is an equidigital number, since it uses as much as digits as its factorization.

917991464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961 (or 2986 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 917991464 is about 30298.3739497683. The cubic root of 917991464 is about 971.8805280290.

The spelling of 917991464 in words is "nine hundred seventeen million, nine hundred ninety-one thousand, four hundred sixty-four".