162491291 has 2 divisors, whose sum is σ = 162491292. Its totient is φ = 162491290.

The previous prime is 162491237. The next prime is 162491317. The reversal of 162491291 is 192194261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162491291 - 2⁶ = 162491227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162491191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81245645 + 81245646.

It is an arithmetic number, because the mean of its divisors is an integer number (81245646).

Almost surely, 2^162491291 is an apocalyptic number.

162491291 is a deficient number, since it is larger than the sum of its proper divisors (1).

162491291 is an equidigital number, since it uses as much as digits as its factorization.

162491291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 162491291 is about 12747.2071843208. The cubic root of 162491291 is about 545.6866926993.

The spelling of 162491291 in words is "one hundred sixty-two million, four hundred ninety-one thousand, two hundred ninety-one".