162918391 has 2 divisors, whose sum is σ = 162918392. Its totient is φ = 162918390.

The previous prime is 162918389. The next prime is 162918487. The reversal of 162918391 is 193819261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 162918391 - 2¹ = 162918389 is a prime.

Together with 162918389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162918341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81459195 + 81459196.

It is an arithmetic number, because the mean of its divisors is an integer number (81459196).

Almost surely, 2^162918391 is an apocalyptic number.

162918391 is a deficient number, since it is larger than the sum of its proper divisors (1).

162918391 is an equidigital number, since it uses as much as digits as its factorization.

162918391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 162918391 is about 12763.9488795592. The cubic root of 162918391 is about 546.1643775542.

The spelling of 162918391 in words is "one hundred sixty-two million, nine hundred eighteen thousand, three hundred ninety-one".