65737813 has 2 divisors, whose sum is σ = 65737814. Its totient is φ = 65737812.

The previous prime is 65737783. The next prime is 65737817. The reversal of 65737813 is 31873756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64352484 + 1385329 = 8022^2 + 1177^2 .

It is a cyclic number.

It is not a de Polignac number, because 65737813 - 2⁵ = 65737781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65737817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32868906 + 32868907.

It is an arithmetic number, because the mean of its divisors is an integer number (32868907).

Almost surely, 2^65737813 is an apocalyptic number.

It is an amenable number.

65737813 is a deficient number, since it is larger than the sum of its proper divisors (1).

65737813 is an equidigital number, since it uses as much as digits as its factorization.

65737813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 65737813 is about 8107.8858526745. The cubic root of 65737813 is about 403.5881602705.

The spelling of 65737813 in words is "sixty-five million, seven hundred thirty-seven thousand, eight hundred thirteen".