64995817 has 2 divisors, whose sum is σ = 64995818. Its totient is φ = 64995816.

The previous prime is 64995793. The next prime is 64995851. The reversal of 64995817 is 71859946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45846441 + 19149376 = 6771^2 + 4376^2 .

It is a cyclic number.

It is not a de Polignac number, because 64995817 - 2¹⁵ = 64963049 is a prime.

It is not a weakly prime, because it can be changed into another prime (64995857) 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, 32497908 + 32497909.

It is an arithmetic number, because the mean of its divisors is an integer number (32497909).

Almost surely, 2^64995817 is an apocalyptic number.

It is an amenable number.

64995817 is a deficient number, since it is larger than the sum of its proper divisors (1).

64995817 is an equidigital number, since it uses as much as digits as its factorization.

64995817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 64995817 is about 8061.9983254774. The cubic root of 64995817 is about 402.0639507017.

The spelling of 64995817 in words is "sixty-four million, nine hundred ninety-five thousand, eight hundred seventeen".