64893633 has 32 divisors (see below), whose sum is σ = 103391232. Its totient is φ = 35424000.

The previous prime is 64893629. The next prime is 64893643. The reversal of 64893633 is 33639846.

It is not a de Polignac number, because 64893633 - 2² = 64893629 is a prime.

It is a super-2 number, since 2×64893633² = 8422367207877378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64893613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53433 + ... + 54633.

It is an arithmetic number, because the mean of its divisors is an integer number (3230976).

Almost surely, 2^64893633 is an apocalyptic number.

It is an amenable number.

64893633 is a deficient number, since it is larger than the sum of its proper divisors (38497599).

64893633 is a wasteful number, since it uses less digits than its factorization.

64893633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

The product of its digits is 279936, while the sum is 42.

The square root of 64893633 is about 8055.6584460862. The cubic root of 64893633 is about 401.8531368679.

The spelling of 64893633 in words is "sixty-four million, eight hundred ninety-three thousand, six hundred thirty-three".