168731413 has 2 divisors, whose sum is σ = 168731414. Its totient is φ = 168731412.

The previous prime is 168731369. The next prime is 168731417. The reversal of 168731413 is 314137861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166487409 + 2244004 = 12903^2 + 1498^2 .

It is a cyclic number.

It is not a de Polignac number, because 168731413 - 2⁹ = 168730901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168731417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84365706 + 84365707.

It is an arithmetic number, because the mean of its divisors is an integer number (84365707).

Almost surely, 2^168731413 is an apocalyptic number.

It is an amenable number.

168731413 is a deficient number, since it is larger than the sum of its proper divisors (1).

168731413 is an equidigital number, since it uses as much as digits as its factorization.

168731413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 168731413 is about 12989.6656231021. The cubic root of 168731413 is about 552.5844351345.

The spelling of 168731413 in words is "one hundred sixty-eight million, seven hundred thirty-one thousand, four hundred thirteen".