64316657 has 2 divisors, whose sum is σ = 64316658. Its totient is φ = 64316656.

The previous prime is 64316647. The next prime is 64316663. The reversal of 64316657 is 75661346.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62078641 + 2238016 = 7879^2 + 1496^2 .

It is a cyclic number.

It is not a de Polignac number, because 64316657 - 2¹⁰ = 64315633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64316657.

It is not a weakly prime, because it can be changed into another prime (64316647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32158328 + 32158329.

It is an arithmetic number, because the mean of its divisors is an integer number (32158329).

Almost surely, 2^64316657 is an apocalyptic number.

It is an amenable number.

64316657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64316657 is an equidigital number, since it uses as much as digits as its factorization.

64316657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 64316657 is about 8019.7666424903. The cubic root of 64316657 is about 400.6586170471.

The spelling of 64316657 in words is "sixty-four million, three hundred sixteen thousand, six hundred fifty-seven".