65318749 has 2 divisors, whose sum is σ = 65318750. Its totient is φ = 65318748.

The previous prime is 65318683. The next prime is 65318761. The reversal of 65318749 is 94781356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65318724 + 25 = 8082^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 65318749 - 2⁷ = 65318621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65318249) 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, 32659374 + 32659375.

It is an arithmetic number, because the mean of its divisors is an integer number (32659375).

Almost surely, 2^65318749 is an apocalyptic number.

It is an amenable number.

65318749 is a deficient number, since it is larger than the sum of its proper divisors (1).

65318749 is an equidigital number, since it uses as much as digits as its factorization.

65318749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 65318749 is about 8082.0015466467. The cubic root of 65318749 is about 402.7287364144.

The spelling of 65318749 in words is "sixty-five million, three hundred eighteen thousand, seven hundred forty-nine".