64238717 has 2 divisors, whose sum is σ = 64238718. Its totient is φ = 64238716.

The previous prime is 64238693. The next prime is 64238737. The reversal of 64238717 is 71783246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 7778521 = 7514^2 + 2789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64238717 is a prime.

It is a super-2 number, since 2×64238717² = 8253225523612178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238737) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119358 + 32119359.

It is an arithmetic number, because the mean of its divisors is an integer number (32119359).

Almost surely, 2^64238717 is an apocalyptic number.

It is an amenable number.

64238717 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238717 is an equidigital number, since it uses as much as digits as its factorization.

64238717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 64238717 is about 8014.9059258359. The cubic root of 64238717 is about 400.4967100259.

The spelling of 64238717 in words is "sixty-four million, two hundred thirty-eight thousand, seven hundred seventeen".