165873873 has 16 divisors (see below), whose sum is σ = 241710336. Its totient is φ = 100346640.

The previous prime is 165873817. The next prime is 165873893. The reversal of 165873873 is 378378561.

It is not a de Polignac number, because 165873873 - 2¹² = 165869777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165873893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15090 + ... + 23652.

It is an arithmetic number, because the mean of its divisors is an integer number (15106896).

Almost surely, 2^165873873 is an apocalyptic number.

It is an amenable number.

165873873 is a deficient number, since it is larger than the sum of its proper divisors (75836463).

165873873 is a wasteful number, since it uses less digits than its factorization.

165873873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164.

The product of its digits is 846720, while the sum is 48.

The square root of 165873873 is about 12879.2031197586. The cubic root of 165873873 is about 549.4472385888.

The spelling of 165873873 in words is "one hundred sixty-five million, eight hundred seventy-three thousand, eight hundred seventy-three".