64395013 has 2 divisors, whose sum is σ = 64395014. Its totient is φ = 64395012.

The previous prime is 64395011. The next prime is 64395017. The reversal of 64395013 is 31059346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47568609 + 16826404 = 6897^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 64395013 - 2¹ = 64395011 is a prime.

Together with 64395011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64395011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32197506 + 32197507.

It is an arithmetic number, because the mean of its divisors is an integer number (32197507).

Almost surely, 2^64395013 is an apocalyptic number.

It is an amenable number.

64395013 is a deficient number, since it is larger than the sum of its proper divisors (1).

64395013 is an equidigital number, since it uses as much as digits as its factorization.

64395013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 64395013 is about 8024.6503350613. The cubic root of 64395013 is about 400.8212564407.

The spelling of 64395013 in words is "sixty-four million, three hundred ninety-five thousand, thirteen".