921764 has 12 divisors (see below), whose sum is σ = 1647744. Its totient is φ = 450984.

The previous prime is 921761. The next prime is 921779. The reversal of 921764 is 467129.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921764.

It is not an unprimeable number, because it can be changed into a prime (921761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264 + ... + 2639.

It is an arithmetic number, because the mean of its divisors is an integer number (137312).

2⁹²¹⁷⁶⁴ is an apocalyptic number.

921764 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

921764 is a deficient number, since it is larger than the sum of its proper divisors (725980).

921764 is a wasteful number, since it uses less digits than its factorization.

921764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954 (or 4952 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 921764 is about 960.0854128670. The cubic root of 921764 is about 97.3210040470.

The spelling of 921764 in words is "nine hundred twenty-one thousand, seven hundred sixty-four".