253872173 has 8 divisors (see below), whose sum is σ = 262209528. Its totient is φ = 245666304.

The previous prime is 253872163. The next prime is 253872181. The reversal of 253872173 is 371278352.

It can be written as a sum of positive squares in 4 ways, for example, as 155426089 + 98446084 = 12467^2 + 9922^2 .

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 253872173 - 2¹² = 253868077 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 (253872163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28940 + ... + 36677.

It is an arithmetic number, because the mean of its divisors is an integer number (32776191).

Almost surely, 2^253872173 is an apocalyptic number.

It is an amenable number.

253872173 is a deficient number, since it is larger than the sum of its proper divisors (8337355).

253872173 is an equidigital number, since it uses as much as digits as its factorization.

253872173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65743.

The product of its digits is 70560, while the sum is 38.

The square root of 253872173 is about 15933.3666561716. The cubic root of 253872173 is about 633.1962975598.

The spelling of 253872173 in words is "two hundred fifty-three million, eight hundred seventy-two thousand, one hundred seventy-three".