68919307 has 2 divisors, whose sum is σ = 68919308. Its totient is φ = 68919306.

The previous prime is 68919259. The next prime is 68919313. The reversal of 68919307 is 70391986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68919307 - 2¹¹ = 68917259 is a prime.

It is not a weakly prime, because it can be changed into another prime (68919317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34459653 + 34459654.

It is an arithmetic number, because the mean of its divisors is an integer number (34459654).

Almost surely, 2^68919307 is an apocalyptic number.

68919307 is a deficient number, since it is larger than the sum of its proper divisors (1).

68919307 is an equidigital number, since it uses as much as digits as its factorization.

68919307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68919307 is about 8301.7652942010. The cubic root of 68919307 is about 409.9966428438.

The spelling of 68919307 in words is "sixty-eight million, nine hundred nineteen thousand, three hundred seven".