64387933 has 2 divisors, whose sum is σ = 64387934. Its totient is φ = 64387932.

The previous prime is 64387927. The next prime is 64387937. The reversal of 64387933 is 33978346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55756089 + 8631844 = 7467^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 64387933 - 2⁵ = 64387901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64387933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64387937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32193966 + 32193967.

It is an arithmetic number, because the mean of its divisors is an integer number (32193967).

Almost surely, 2^64387933 is an apocalyptic number.

It is an amenable number.

64387933 is a deficient number, since it is larger than the sum of its proper divisors (1).

64387933 is an equidigital number, since it uses as much as digits as its factorization.

64387933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 64387933 is about 8024.2091822185. The cubic root of 64387933 is about 400.8065662839.

The spelling of 64387933 in words is "sixty-four million, three hundred eighty-seven thousand, nine hundred thirty-three".