162008981 has 2 divisors, whose sum is σ = 162008982. Its totient is φ = 162008980.

The previous prime is 162008971. The next prime is 162009011. The reversal of 162008981 is 189800261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 31820881 = 11410^2 + 5641^2 .

It is a cyclic number.

It is not a de Polignac number, because 162008981 - 2²² = 157814677 is a prime.

It is a super-2 number, since 2×162008981² = 52493819849316722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162008911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81004490 + 81004491.

It is an arithmetic number, because the mean of its divisors is an integer number (81004491).

Almost surely, 2^162008981 is an apocalyptic number.

It is an amenable number.

162008981 is a deficient number, since it is larger than the sum of its proper divisors (1).

162008981 is an equidigital number, since it uses as much as digits as its factorization.

162008981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 162008981 is about 12728.2748634683. The cubic root of 162008981 is about 545.1462514660.

The spelling of 162008981 in words is "one hundred sixty-two million, eight thousand, nine hundred eighty-one".