165475823 has 8 divisors (see below), whose sum is σ = 172800000. Its totient is φ = 158162488.

The previous prime is 165475813. The next prime is 165475847. The reversal of 165475823 is 328574561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165475823 - 2¹⁴ = 165459439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165475813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53678 + ... + 56676.

It is an arithmetic number, because the mean of its divisors is an integer number (21600000).

Almost surely, 2^165475823 is an apocalyptic number.

165475823 is a deficient number, since it is larger than the sum of its proper divisors (7324177).

165475823 is a wasteful number, since it uses less digits than its factorization.

165475823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421.

The product of its digits is 201600, while the sum is 41.

The square root of 165475823 is about 12863.7406301589. The cubic root of 165475823 is about 549.0073809867.

It can be divided in two parts, 1654 and 75823, that added together give a palindrome (77477).

The spelling of 165475823 in words is "one hundred sixty-five million, four hundred seventy-five thousand, eight hundred twenty-three".