64042513 has 2 divisors, whose sum is σ = 64042514. Its totient is φ = 64042512.

The previous prime is 64042501. The next prime is 64042543. The reversal of 64042513 is 31524046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46335249 + 17707264 = 6807^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 64042513 - 2⁵ = 64042481 is a prime.

It is not a weakly prime, because it can be changed into another prime (64042543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32021256 + 32021257.

It is an arithmetic number, because the mean of its divisors is an integer number (32021257).

Almost surely, 2^64042513 is an apocalyptic number.

It is an amenable number.

64042513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64042513 is an equidigital number, since it uses as much as digits as its factorization.

64042513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 64042513 is about 8002.6566213977. The cubic root of 64042513 is about 400.0885491462.

Adding to 64042513 its reverse (31524046), we get a palindrome (95566559).

The spelling of 64042513 in words is "sixty-four million, forty-two thousand, five hundred thirteen".