64507013 has 2 divisors, whose sum is σ = 64507014. Its totient is φ = 64507012.

The previous prime is 64506971. The next prime is 64507031. The reversal of 64507013 is 31070546.

Together with next prime (64507031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61183684 + 3323329 = 7822^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 64507013 - 2¹⁰ = 64505989 is a prime.

It is a super-2 number, since 2×64507013² = 8322309452364338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64507043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32253506 + 32253507.

It is an arithmetic number, because the mean of its divisors is an integer number (32253507).

Almost surely, 2^64507013 is an apocalyptic number.

It is an amenable number.

64507013 is a deficient number, since it is larger than the sum of its proper divisors (1).

64507013 is an equidigital number, since it uses as much as digits as its factorization.

64507013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 64507013 is about 8031.6258005462. The cubic root of 64507013 is about 401.0534999918.

Adding to 64507013 its reverse (31070546), we get a palindrome (95577559).

The spelling of 64507013 in words is "sixty-four million, five hundred seven thousand, thirteen".