162921623 has 4 divisors (see below), whose sum is σ = 168539640. Its totient is φ = 157303608.

The previous prime is 162921617. The next prime is 162921631. The reversal of 162921623 is 326129261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326129261 = 16477 ⋅19793.

It is a cyclic number.

It is not a de Polignac number, because 162921623 - 2⁴ = 162921607 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 162921623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162921643) 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, 2808965 + ... + 2809022.

It is an arithmetic number, because the mean of its divisors is an integer number (42134910).

Almost surely, 2^162921623 is an apocalyptic number.

162921623 is a deficient number, since it is larger than the sum of its proper divisors (5618017).

162921623 is an equidigital number, since it uses as much as digits as its factorization.

162921623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618016.

The product of its digits is 7776, while the sum is 32.

The square root of 162921623 is about 12764.0754855179. The cubic root of 162921623 is about 546.1679891612.

The spelling of 162921623 in words is "one hundred sixty-two million, nine hundred twenty-one thousand, six hundred twenty-three".