68707609 has 2 divisors, whose sum is σ = 68707610. Its totient is φ = 68707608.

The previous prime is 68707607. The next prime is 68707619. The reversal of 68707609 is 90670786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47224384 + 21483225 = 6872^2 + 4635^2 .

It is a cyclic number.

It is not a de Polignac number, because 68707609 - 2¹ = 68707607 is a prime.

Together with 68707607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68707607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34353804 + 34353805.

It is an arithmetic number, because the mean of its divisors is an integer number (34353805).

Almost surely, 2^68707609 is an apocalyptic number.

It is an amenable number.

68707609 is a deficient number, since it is larger than the sum of its proper divisors (1).

68707609 is an equidigital number, since it uses as much as digits as its factorization.

68707609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 68707609 is about 8289.0053082381. The cubic root of 68707609 is about 409.5764195696.

The spelling of 68707609 in words is "sixty-eight million, seven hundred seven thousand, six hundred nine".