64085513 has 2 divisors, whose sum is σ = 64085514. Its totient is φ = 64085512.

The previous prime is 64085507. The next prime is 64085519. The reversal of 64085513 is 31558046.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (64085507) and next prime (64085519).

It can be written as a sum of positive squares in only one way, i.e., 56670784 + 7414729 = 7528^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 64085513 - 2¹² = 64081417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64085513.

It is not a weakly prime, because it can be changed into another prime (64085519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32042756 + 32042757.

It is an arithmetic number, because the mean of its divisors is an integer number (32042757).

Almost surely, 2^64085513 is an apocalyptic number.

It is an amenable number.

64085513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64085513 is an equidigital number, since it uses as much as digits as its factorization.

64085513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 64085513 is about 8005.3427784199. The cubic root of 64085513 is about 400.1780727968.

The spelling of 64085513 in words is "sixty-four million, eighty-five thousand, five hundred thirteen".