168156089 has 2 divisors, whose sum is σ = 168156090. Its totient is φ = 168156088.

The previous prime is 168156073. The next prime is 168156103. The reversal of 168156089 is 980651861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 7246864 = 12685^2 + 2692^2 .

It is a cyclic number.

It is not a de Polignac number, because 168156089 - 2⁴ = 168156073 is a prime.

It is not a weakly prime, because it can be changed into another prime (168156019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84078044 + 84078045.

It is an arithmetic number, because the mean of its divisors is an integer number (84078045).

Almost surely, 2^168156089 is an apocalyptic number.

It is an amenable number.

168156089 is a deficient number, since it is larger than the sum of its proper divisors (1).

168156089 is an equidigital number, since it uses as much as digits as its factorization.

168156089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 168156089 is about 12967.5012627723. The cubic root of 168156089 is about 551.9556703619.

The spelling of 168156089 in words is "one hundred sixty-eight million, one hundred fifty-six thousand, eighty-nine".