64385837 has 2 divisors, whose sum is σ = 64385838. Its totient is φ = 64385836.

The previous prime is 64385833. The next prime is 64385843. The reversal of 64385837 is 73858346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38365636 + 26020201 = 6194^2 + 5101^2 .

It is a cyclic number.

It is not a de Polignac number, because 64385837 - 2² = 64385833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64385833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32192918 + 32192919.

It is an arithmetic number, because the mean of its divisors is an integer number (32192919).

Almost surely, 2^64385837 is an apocalyptic number.

It is an amenable number.

64385837 is a deficient number, since it is larger than the sum of its proper divisors (1).

64385837 is an equidigital number, since it uses as much as digits as its factorization.

64385837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 64385837 is about 8024.0785763850. The cubic root of 64385837 is about 400.8022171270.

The spelling of 64385837 in words is "sixty-four million, three hundred eighty-five thousand, eight hundred thirty-seven".