68190907 has 2 divisors, whose sum is σ = 68190908. Its totient is φ = 68190906.

The previous prime is 68190901. The next prime is 68190923. The reversal of 68190907 is 70909186.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68190907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68190907.

It is not a weakly prime, because it can be changed into another prime (68190901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34095453 + 34095454.

It is an arithmetic number, because the mean of its divisors is an integer number (34095454).

Almost surely, 2^68190907 is an apocalyptic number.

68190907 is a deficient number, since it is larger than the sum of its proper divisors (1).

68190907 is an equidigital number, since it uses as much as digits as its factorization.

68190907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 68190907 is about 8257.7785753797. The cubic root of 68190907 is about 408.5471221821.

The spelling of 68190907 in words is "sixty-eight million, one hundred ninety thousand, nine hundred seven".