64493659 has 2 divisors, whose sum is σ = 64493660. Its totient is φ = 64493658.

The previous prime is 64493629. The next prime is 64493677. The reversal of 64493659 is 95639446.

64493659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64493659 - 2⁹ = 64493147 is a prime.

It is not a weakly prime, because it can be changed into another prime (64493629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32246829 + 32246830.

It is an arithmetic number, because the mean of its divisors is an integer number (32246830).

Almost surely, 2^64493659 is an apocalyptic number.

64493659 is a deficient number, since it is larger than the sum of its proper divisors (1).

64493659 is an equidigital number, since it uses as much as digits as its factorization.

64493659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The square root of 64493659 is about 8030.7944189850. The cubic root of 64493659 is about 401.0258232179.

The spelling of 64493659 in words is "sixty-four million, four hundred ninety-three thousand, six hundred fifty-nine".