172823585 has 16 divisors (see below), whose sum is σ = 229433472. Its totient is φ = 123916800.

The previous prime is 172823561. The next prime is 172823591. The reversal of 172823585 is 585328271.

It is not a de Polignac number, because 172823585 - 2¹⁶ = 172758049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18224 + ... + 26033.

It is an arithmetic number, because the mean of its divisors is an integer number (14339592).

Almost surely, 2^172823585 is an apocalyptic number.

It is an amenable number.

172823585 is a deficient number, since it is larger than the sum of its proper divisors (56609887).

172823585 is a wasteful number, since it uses less digits than its factorization.

172823585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44344.

The product of its digits is 134400, while the sum is 41.

The square root of 172823585 is about 13146.2384353852. The cubic root of 172823585 is about 557.0159995920.

The spelling of 172823585 in words is "one hundred seventy-two million, eight hundred twenty-three thousand, five hundred eighty-five".