172573253 has 2 divisors, whose sum is σ = 172573254. Its totient is φ = 172573252.

The previous prime is 172573231. The next prime is 172573267. The reversal of 172573253 is 352375271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164916964 + 7656289 = 12842^2 + 2767^2 .

It is an emirp because it is prime and its reverse (352375271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172573253 - 2⁶ = 172573189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172575253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86286626 + 86286627.

It is an arithmetic number, because the mean of its divisors is an integer number (86286627).

Almost surely, 2^172573253 is an apocalyptic number.

It is an amenable number.

172573253 is a deficient number, since it is larger than the sum of its proper divisors (1).

172573253 is an equidigital number, since it uses as much as digits as its factorization.

172573253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 35.

The square root of 172573253 is about 13136.7139346185. The cubic root of 172573253 is about 556.7469269258.

The spelling of 172573253 in words is "one hundred seventy-two million, five hundred seventy-three thousand, two hundred fifty-three".