68565313 has 2 divisors, whose sum is σ = 68565314. Its totient is φ = 68565312.

The previous prime is 68565311. The next prime is 68565337. The reversal of 68565313 is 31356586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49660209 + 18905104 = 7047^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 68565313 - 2¹ = 68565311 is a prime.

Together with 68565311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68565311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34282656 + 34282657.

It is an arithmetic number, because the mean of its divisors is an integer number (34282657).

Almost surely, 2^68565313 is an apocalyptic number.

It is an amenable number.

68565313 is a deficient number, since it is larger than the sum of its proper divisors (1).

68565313 is an equidigital number, since it uses as much as digits as its factorization.

68565313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 68565313 is about 8280.4174411680. The cubic root of 68565313 is about 409.2934748443.

The spelling of 68565313 in words is "sixty-eight million, five hundred sixty-five thousand, three hundred thirteen".