64893623 has 2 divisors, whose sum is σ = 64893624. Its totient is φ = 64893622.

The previous prime is 64893613. The next prime is 64893629. The reversal of 64893623 is 32639846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64893623 - 2⁶ = 64893559 is a prime.

It is a super-2 number, since 2×64893623² = 8422364612132258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64893629) 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 as a sum of consecutive naturals, namely, 32446811 + 32446812.

It is an arithmetic number, because the mean of its divisors is an integer number (32446812).

Almost surely, 2^64893623 is an apocalyptic number.

64893623 is a deficient number, since it is larger than the sum of its proper divisors (1).

64893623 is an equidigital number, since it uses as much as digits as its factorization.

64893623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 64893623 is about 8055.6578254045. The cubic root of 64893623 is about 401.8531162263.

The spelling of 64893623 in words is "sixty-four million, eight hundred ninety-three thousand, six hundred twenty-three".