162381091 has 4 divisors (see below), whose sum is σ = 162863272. Its totient is φ = 161898912.

The previous prime is 162381083. The next prime is 162381101. The reversal of 162381091 is 190183261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162381091 - 2³ = 162381083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162381041) 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, 240585 + ... + 241258.

It is an arithmetic number, because the mean of its divisors is an integer number (40715818).

Almost surely, 2^162381091 is an apocalyptic number.

162381091 is a deficient number, since it is larger than the sum of its proper divisors (482181).

162381091 is an equidigital number, since it uses as much as digits as its factorization.

162381091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482180.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 162381091 is about 12742.8839357502. The cubic root of 162381091 is about 545.5633050139.

The spelling of 162381091 in words is "one hundred sixty-two million, three hundred eighty-one thousand, ninety-one".