68960909 has 2 divisors, whose sum is σ = 68960910. Its totient is φ = 68960908.

The previous prime is 68960887. The next prime is 68960929. The reversal of 68960909 is 90906986.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 25532809 = 6590^2 + 5053^2 .

It is a cyclic number.

It is not a de Polignac number, because 68960909 - 2²⁰ = 67912333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68960929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34480454 + 34480455.

It is an arithmetic number, because the mean of its divisors is an integer number (34480455).

Almost surely, 2^68960909 is an apocalyptic number.

It is an amenable number.

68960909 is a deficient number, since it is larger than the sum of its proper divisors (1).

68960909 is an equidigital number, since it uses as much as digits as its factorization.

68960909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 68960909 is about 8304.2705278670. The cubic root of 68960909 is about 410.0791221482.

The spelling of 68960909 in words is "sixty-eight million, nine hundred sixty thousand, nine hundred nine".