64537933 has 4 divisors (see below), whose sum is σ = 68334300. Its totient is φ = 60741568.

The previous prime is 64537897. The next prime is 64537943. The reversal of 64537933 is 33973546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19554084 + 44983849 = 4422^2 + 6707^2 .

It is a cyclic number.

It is not a de Polignac number, because 64537933 - 2¹³ = 64529741 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 (64537943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898158 + ... + 1898191.

It is an arithmetic number, because the mean of its divisors is an integer number (17083575).

Almost surely, 2^64537933 is an apocalyptic number.

It is an amenable number.

64537933 is a deficient number, since it is larger than the sum of its proper divisors (3796367).

64537933 is a wasteful number, since it uses less digits than its factorization.

64537933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796366.

The product of its digits is 204120, while the sum is 40.

The square root of 64537933 is about 8033.5504604129. The cubic root of 64537933 is about 401.1175684440.

The spelling of 64537933 in words is "sixty-four million, five hundred thirty-seven thousand, nine hundred thirty-three".