172630085 has 4 divisors (see below), whose sum is σ = 207156108. Its totient is φ = 138104064.

The previous prime is 172630057. The next prime is 172630093. The reversal of 172630085 is 580036271.

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: 580036271 = 4201 ⋅138071.

It can be written as a sum of positive squares in 2 ways, for example, as 21659716 + 150970369 = 4654^2 + 12287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172630085 is a prime.

It is a super-2 number, since 2×172630085² = 59602292494214450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17263004 + ... + 17263013.

It is an arithmetic number, because the mean of its divisors is an integer number (51789027).

Almost surely, 2^172630085 is an apocalyptic number.

It is an amenable number.

172630085 is a deficient number, since it is larger than the sum of its proper divisors (34526023).

172630085 is an equidigital number, since it uses as much as digits as its factorization.

172630085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34526022.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 172630085 is about 13138.8768545869. The cubic root of 172630085 is about 556.8080363737.

The spelling of 172630085 in words is "one hundred seventy-two million, six hundred thirty thousand, eighty-five".