64597213 has 2 divisors, whose sum is σ = 64597214. Its totient is φ = 64597212.

The previous prime is 64597201. The next prime is 64597217. The reversal of 64597213 is 31279546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64593369 + 3844 = 8037^2 + 62^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64597213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64597217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32298606 + 32298607.

It is an arithmetic number, because the mean of its divisors is an integer number (32298607).

Almost surely, 2^64597213 is an apocalyptic number.

It is an amenable number.

64597213 is a deficient number, since it is larger than the sum of its proper divisors (1).

64597213 is an equidigital number, since it uses as much as digits as its factorization.

64597213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 64597213 is about 8037.2391404014. The cubic root of 64597213 is about 401.2403436437.

The spelling of 64597213 in words is "sixty-four million, five hundred ninety-seven thousand, two hundred thirteen".