64699513 has 2 divisors, whose sum is σ = 64699514. Its totient is φ = 64699512.

The previous prime is 64699463. The next prime is 64699519. The reversal of 64699513 is 31599646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51652969 + 13046544 = 7187^2 + 3612^2 .

It is a cyclic number.

It is not a de Polignac number, because 64699513 - 2⁹ = 64699001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64699513.

It is not a weakly prime, because it can be changed into another prime (64699519) 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, 32349756 + 32349757.

It is an arithmetic number, because the mean of its divisors is an integer number (32349757).

Almost surely, 2^64699513 is an apocalyptic number.

It is an amenable number.

64699513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64699513 is an equidigital number, since it uses as much as digits as its factorization.

64699513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 64699513 is about 8043.6007484211. The cubic root of 64699513 is about 401.4520413119.

The spelling of 64699513 in words is "sixty-four million, six hundred ninety-nine thousand, five hundred thirteen".