168128371 has 2 divisors, whose sum is σ = 168128372. Its totient is φ = 168128370.

The previous prime is 168128357. The next prime is 168128437. The reversal of 168128371 is 173821861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168128371 - 2⁵ = 168128339 is a prime.

It is a super-2 number, since 2×168128371² = 56534298270227282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168128371.

It is not a weakly prime, because it can be changed into another prime (168128771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84064185 + 84064186.

It is an arithmetic number, because the mean of its divisors is an integer number (84064186).

Almost surely, 2^168128371 is an apocalyptic number.

168128371 is a deficient number, since it is larger than the sum of its proper divisors (1).

168128371 is an equidigital number, since it uses as much as digits as its factorization.

168128371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 168128371 is about 12966.4324700359. The cubic root of 168128371 is about 551.9253415009.

The spelling of 168128371 in words is "one hundred sixty-eight million, one hundred twenty-eight thousand, three hundred seventy-one".