919664 has 20 divisors (see below), whose sum is σ = 1796760. Its totient is φ = 456000.

The previous prime is 919631. The next prime is 919679. The reversal of 919664 is 466919.

It is a super-3 number, since 3×919664³ = 2333505421065080832, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 919664.

It is an unprimeable number.

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, 3539 + ... + 3789.

It is an arithmetic number, because the mean of its divisors is an integer number (89838).

2⁹¹⁹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

919664 is a deficient number, since it is larger than the sum of its proper divisors (877096).

919664 is a wasteful number, since it uses less digits than its factorization.

919664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 919664 is about 958.9911365597. The cubic root of 919664 is about 97.2470409684.

The spelling of 919664 in words is "nine hundred nineteen thousand, six hundred sixty-four".