64630613 has 2 divisors, whose sum is σ = 64630614. Its totient is φ = 64630612.

The previous prime is 64630603. The next prime is 64630639. The reversal of 64630613 is 31603646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35976004 + 28654609 = 5998^2 + 5353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64630613 is a prime.

It is a super-2 number, since 2×64630613² = 8354232273511538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64630603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32315306 + 32315307.

It is an arithmetic number, because the mean of its divisors is an integer number (32315307).

Almost surely, 2^64630613 is an apocalyptic number.

It is an amenable number.

64630613 is a deficient number, since it is larger than the sum of its proper divisors (1).

64630613 is an equidigital number, since it uses as much as digits as its factorization.

64630613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 64630613 is about 8039.3166998197. The cubic root of 64630613 is about 401.3094855245.

The spelling of 64630613 in words is "sixty-four million, six hundred thirty thousand, six hundred thirteen".