168025813 has 2 divisors, whose sum is σ = 168025814. Its totient is φ = 168025812.

The previous prime is 168025783. The next prime is 168025919. The reversal of 168025813 is 318520861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160224964 + 7800849 = 12658^2 + 2793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168025813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168065813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84012906 + 84012907.

It is an arithmetic number, because the mean of its divisors is an integer number (84012907).

Almost surely, 2^168025813 is an apocalyptic number.

It is an amenable number.

168025813 is a deficient number, since it is larger than the sum of its proper divisors (1).

168025813 is an equidigital number, since it uses as much as digits as its factorization.

168025813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 168025813 is about 12962.4771166625. The cubic root of 168025813 is about 551.8130941900.

The spelling of 168025813 in words is "one hundred sixty-eight million, twenty-five thousand, eight hundred thirteen".