64891323 has 12 divisors (see below), whose sum is σ = 107122288. Its totient is φ = 37080720.

The previous prime is 64891279. The next prime is 64891361. The reversal of 64891323 is 32319846.

64891323 is a `hidden beast` number, since 648 + 9 + 1 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 64891323 - 2¹⁰ = 64890299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64891223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514948 + ... + 515073.

Almost surely, 2^64891323 is an apocalyptic number.

64891323 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

64891323 is a deficient number, since it is larger than the sum of its proper divisors (42230965).

64891323 is a wasteful number, since it uses less digits than its factorization.

64891323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030034 (or 1030031 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 64891323 is about 8055.5150673312. The cubic root of 64891323 is about 401.8483685945.

The spelling of 64891323 in words is "sixty-four million, eight hundred ninety-one thousand, three hundred twenty-three".