162993391 has 8 divisors (see below), whose sum is σ = 181166544. Its totient is φ = 145379520.

The previous prime is 162993377. The next prime is 162993401. The reversal of 162993391 is 193399261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 162993391 - 2⁵ = 162993359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162993301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139206 + ... + 140371.

It is an arithmetic number, because the mean of its divisors is an integer number (22645818).

Almost surely, 2^162993391 is an apocalyptic number.

162993391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

162993391 is a deficient number, since it is larger than the sum of its proper divisors (18173153).

162993391 is a wasteful number, since it uses less digits than its factorization.

162993391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279641.

The product of its digits is 78732, while the sum is 43.

The square root of 162993391 is about 12766.8865037643. The cubic root of 162993391 is about 546.2481742002.

The spelling of 162993391 in words is "one hundred sixty-two million, nine hundred ninety-three thousand, three hundred ninety-one".