168951613 has 2 divisors, whose sum is σ = 168951614. Its totient is φ = 168951612.

The previous prime is 168951589. The next prime is 168951659. The reversal of 168951613 is 316159861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168662169 + 289444 = 12987^2 + 538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168951613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168951413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84475806 + 84475807.

It is an arithmetic number, because the mean of its divisors is an integer number (84475807).

Almost surely, 2^168951613 is an apocalyptic number.

It is an amenable number.

168951613 is a deficient number, since it is larger than the sum of its proper divisors (1).

168951613 is an equidigital number, since it uses as much as digits as its factorization.

168951613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 168951613 is about 12998.1388283092. The cubic root of 168951613 is about 552.8247108822.

The spelling of 168951613 in words is "one hundred sixty-eight million, nine hundred fifty-one thousand, six hundred thirteen".