162942809 has 4 divisors (see below), whose sum is σ = 163062180. Its totient is φ = 162823440.

The previous prime is 162942779. The next prime is 162942811. The reversal of 162942809 is 908249261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908249261 = 41 ⋅22152421.

It can be written as a sum of positive squares in 2 ways, for example, as 64000000 + 98942809 = 8000^2 + 9947^2 .

It is a cyclic number.

It is not a de Polignac number, because 162942809 - 2⁸ = 162942553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (162942839) 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, 57614 + ... + 60375.

It is an arithmetic number, because the mean of its divisors is an integer number (40765545).

Almost surely, 2^162942809 is an apocalyptic number.

It is an amenable number.

162942809 is a deficient number, since it is larger than the sum of its proper divisors (119371).

162942809 is a wasteful number, since it uses less digits than its factorization.

162942809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119370.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 162942809 is about 12764.9053658850. The cubic root of 162942809 is about 546.1916623305.

The spelling of 162942809 in words is "one hundred sixty-two million, nine hundred forty-two thousand, eight hundred nine".