64392917 has 2 divisors, whose sum is σ = 64392918. Its totient is φ = 64392916.

The previous prime is 64392907. The next prime is 64392929. The reversal of 64392917 is 71929346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55860676 + 8532241 = 7474^2 + 2921^2 .

It is a cyclic number.

It is not a de Polignac number, because 64392917 - 2⁴ = 64392901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64392907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32196458 + 32196459.

It is an arithmetic number, because the mean of its divisors is an integer number (32196459).

Almost surely, 2^64392917 is an apocalyptic number.

It is an amenable number.

64392917 is a deficient number, since it is larger than the sum of its proper divisors (1).

64392917 is an equidigital number, since it uses as much as digits as its factorization.

64392917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 64392917 is about 8024.5197364079. The cubic root of 64392917 is about 400.8169076025.

The spelling of 64392917 in words is "sixty-four million, three hundred ninety-two thousand, nine hundred seventeen".