162981811 has 2 divisors, whose sum is σ = 162981812. Its totient is φ = 162981810.

The previous prime is 162981803. The next prime is 162981851. The reversal of 162981811 is 118189261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 162981811 - 2³ = 162981803 is a prime.

It is not a weakly prime, because it can be changed into another prime (162981851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81490905 + 81490906.

It is an arithmetic number, because the mean of its divisors is an integer number (81490906).

Almost surely, 2^162981811 is an apocalyptic number.

162981811 is a deficient number, since it is larger than the sum of its proper divisors (1).

162981811 is an equidigital number, since it uses as much as digits as its factorization.

162981811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 37.

The square root of 162981811 is about 12766.4329787141. The cubic root of 162981811 is about 546.2352376763.

The spelling of 162981811 in words is "one hundred sixty-two million, nine hundred eighty-one thousand, eight hundred eleven".