162973381 has 4 divisors (see below), whose sum is σ = 163579500. Its totient is φ = 162367264.

The previous prime is 162973367. The next prime is 162973429. The reversal of 162973381 is 183379261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183379261 = 13 ⋅14106097.

It can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 147841281 = 3890^2 + 12159^2 .

It is a cyclic number.

It is not a de Polignac number, because 162973381 - 2⁹ = 162972869 is a prime.

It is a super-2 number, since 2×162973381² = 53120645829142322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162973361) 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, 302656 + ... + 303193.

It is an arithmetic number, because the mean of its divisors is an integer number (40894875).

Almost surely, 2^162973381 is an apocalyptic number.

It is an amenable number.

162973381 is a deficient number, since it is larger than the sum of its proper divisors (606119).

162973381 is an equidigital number, since it uses as much as digits as its factorization.

162973381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606118.

The product of its digits is 54432, while the sum is 40.

The square root of 162973381 is about 12766.1028117433. The cubic root of 162973381 is about 546.2258197697.

The spelling of 162973381 in words is "one hundred sixty-two million, nine hundred seventy-three thousand, three hundred eighty-one".