172813005 has 12 divisors (see below), whose sum is σ = 299542620. Its totient is φ = 92166912.

The previous prime is 172812979. The next prime is 172813049. The reversal of 172813005 is 500318271.

It can be written as a sum of positive squares in 2 ways, for example, as 86657481 + 86155524 = 9309^2 + 9282^2 .

It is not a de Polignac number, because 172813005 - 2⁷ = 172812877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172813005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1920100 + ... + 1920189.

It is an arithmetic number, because the mean of its divisors is an integer number (24961885).

Almost surely, 2^172813005 is an apocalyptic number.

172813005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172813005 is a deficient number, since it is larger than the sum of its proper divisors (126729615).

172813005 is a wasteful number, since it uses less digits than its factorization.

172813005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840300 (or 3840297 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 172813005 is about 13145.8360327520. The cubic root of 172813005 is about 557.0046327994.

The spelling of 172813005 in words is "one hundred seventy-two million, eight hundred thirteen thousand, five".