168490307 has 2 divisors, whose sum is σ = 168490308. Its totient is φ = 168490306.

The previous prime is 168490303. The next prime is 168490337. The reversal of 168490307 is 703094861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168490307 - 2² = 168490303 is a prime.

It is not a weakly prime, because it can be changed into another prime (168490303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84245153 + 84245154.

It is an arithmetic number, because the mean of its divisors is an integer number (84245154).

Almost surely, 2^168490307 is an apocalyptic number.

168490307 is a deficient number, since it is larger than the sum of its proper divisors (1).

168490307 is an equidigital number, since it uses as much as digits as its factorization.

168490307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 168490307 is about 12980.3816199679. The cubic root of 168490307 is about 552.3211074974.

The spelling of 168490307 in words is "one hundred sixty-eight million, four hundred ninety thousand, three hundred seven".