68930809 has 2 divisors, whose sum is σ = 68930810. Its totient is φ = 68930808.

The previous prime is 68930779. The next prime is 68930843. The reversal of 68930809 is 90803986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51265600 + 17665209 = 7160^2 + 4203^2 .

It is a cyclic number.

It is not a de Polignac number, because 68930809 - 2²⁵ = 35376377 is a prime.

It is not a weakly prime, because it can be changed into another prime (68930009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34465404 + 34465405.

It is an arithmetic number, because the mean of its divisors is an integer number (34465405).

Almost surely, 2^68930809 is an apocalyptic number.

It is an amenable number.

68930809 is a deficient number, since it is larger than the sum of its proper divisors (1).

68930809 is an equidigital number, since it uses as much as digits as its factorization.

68930809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 68930809 is about 8302.4580095295. The cubic root of 68930809 is about 410.0194498011.

The spelling of 68930809 in words is "sixty-eight million, nine hundred thirty thousand, eight hundred nine".