64939133 has 16 divisors (see below), whose sum is σ = 78958080. Its totient is φ = 52137216.

The previous prime is 64939129. The next prime is 64939153. The reversal of 64939133 is 33193946.

It is a cyclic number.

It is not a de Polignac number, because 64939133 - 2² = 64939129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64939103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26060 + ... + 28442.

It is an arithmetic number, because the mean of its divisors is an integer number (4934880).

Almost surely, 2^64939133 is an apocalyptic number.

It is an amenable number.

64939133 is a deficient number, since it is larger than the sum of its proper divisors (14018947).

64939133 is a wasteful number, since it uses less digits than its factorization.

64939133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its digits is 52488, while the sum is 38.

The square root of 64939133 is about 8058.4820530916. The cubic root of 64939133 is about 401.9470343492.

The spelling of 64939133 in words is "sixty-four million, nine hundred thirty-nine thousand, one hundred thirty-three".