64938933 has 6 divisors (see below), whose sum is σ = 93800694. Its totient is φ = 43292616.

The previous prime is 64938931. The next prime is 64938947. The reversal of 64938933 is 33983946.

It can be written as a sum of positive squares in only one way, i.e., 64931364 + 7569 = 8058^2 + 87^2 .

It is not a de Polignac number, because 64938933 - 2¹ = 64938931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64938931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3607710 + ... + 3607727.

It is an arithmetic number, because the mean of its divisors is an integer number (15633449).

Almost surely, 2^64938933 is an apocalyptic number.

It is an amenable number.

64938933 is a deficient number, since it is larger than the sum of its proper divisors (28861761).

64938933 is a wasteful number, since it uses less digits than its factorization.

64938933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215443 (or 7215440 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 64938933 is about 8058.4696437971. The cubic root of 64938933 is about 401.9466217090.

The spelling of 64938933 in words is "sixty-four million, nine hundred thirty-eight thousand, nine hundred thirty-three".