891500164 has 9 divisors (see below), whose sum is σ = 1560229797. Its totient is φ = 445720224.

The previous prime is 891500153. The next prime is 891500167. The reversal of 891500164 is 461005198.

The square root of 891500164 is 29858.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 769618564 + 121881600 = 27742^2 + 11040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891500167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52252 + ... + 67180.

Almost surely, 2^891500164 is an apocalyptic number.

891500164 is the 29858-th square number.

It is an amenable number.

891500164 is a deficient number, since it is larger than the sum of its proper divisors (668729633).

891500164 is an frugal number, since it uses more digits than its factorization.

891500164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29862 (or 14931 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The cubic root of 891500164 is about 962.4403206714.

The spelling of 891500164 in words is "eight hundred ninety-one million, five hundred thousand, one hundred sixty-four".