162738921 has 4 divisors (see below), whose sum is σ = 216985232. Its totient is φ = 108492612.

The previous prime is 162738899. The next prime is 162738929. The reversal of 162738921 is 129837261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 162738921 - 2¹⁷ = 162607849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162738921.

It is not an unprimeable number, because it can be changed into a prime (162738929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27123151 + ... + 27123156.

It is an arithmetic number, because the mean of its divisors is an integer number (54246308).

Almost surely, 2^162738921 is an apocalyptic number.

It is an amenable number.

162738921 is a deficient number, since it is larger than the sum of its proper divisors (54246311).

162738921 is an equidigital number, since it uses as much as digits as its factorization.

162738921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54246310.

The product of its digits is 36288, while the sum is 39.

The square root of 162738921 is about 12756.9165945380. The cubic root of 162738921 is about 545.9637533130.

The spelling of 162738921 in words is "one hundred sixty-two million, seven hundred thirty-eight thousand, nine hundred twenty-one".