168359861 has 2 divisors, whose sum is σ = 168359862. Its totient is φ = 168359860.

The previous prime is 168359809. The next prime is 168359887. The reversal of 168359861 is 168953861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 31024900 = 11719^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 168359861 - 2⁶ = 168359797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168359801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84179930 + 84179931.

It is an arithmetic number, because the mean of its divisors is an integer number (84179931).

Almost surely, 2^168359861 is an apocalyptic number.

It is an amenable number.

168359861 is a deficient number, since it is larger than the sum of its proper divisors (1).

168359861 is an equidigital number, since it uses as much as digits as its factorization.

168359861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 168359861 is about 12975.3559103402. The cubic root of 168359861 is about 552.1785341514.

The spelling of 168359861 in words is "one hundred sixty-eight million, three hundred fifty-nine thousand, eight hundred sixty-one".