162993431 has 2 divisors, whose sum is σ = 162993432. Its totient is φ = 162993430.

The previous prime is 162993407. The next prime is 162993437. The reversal of 162993431 is 134399261.

It is a strong prime.

It is an emirp because it is prime and its reverse (134399261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162993431 is a prime.

It is a super-2 number, since 2×162993431² = 53133717098303522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162993437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81496715 + 81496716.

It is an arithmetic number, because the mean of its divisors is an integer number (81496716).

Almost surely, 2^162993431 is an apocalyptic number.

162993431 is a deficient number, since it is larger than the sum of its proper divisors (1).

162993431 is an equidigital number, since it uses as much as digits as its factorization.

162993431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 162993431 is about 12766.8880703169. Note that the first 3 decimals coincide. The cubic root of 162993431 is about 546.2482188849.

The spelling of 162993431 in words is "one hundred sixty-two million, nine hundred ninety-three thousand, four hundred thirty-one".