168391607 has 2 divisors, whose sum is σ = 168391608. Its totient is φ = 168391606.

The previous prime is 168391591. The next prime is 168391621. The reversal of 168391607 is 706193861.

It is a strong prime.

It is an emirp because it is prime and its reverse (706193861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168391607 - 2⁴ = 168391591 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 (168391637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84195803 + 84195804.

It is an arithmetic number, because the mean of its divisors is an integer number (84195804).

Almost surely, 2^168391607 is an apocalyptic number.

168391607 is a deficient number, since it is larger than the sum of its proper divisors (1).

168391607 is an equidigital number, since it uses as much as digits as its factorization.

168391607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 168391607 is about 12976.5791717232. The cubic root of 168391607 is about 552.2132383023.

The spelling of 168391607 in words is "one hundred sixty-eight million, three hundred ninety-one thousand, six hundred seven".