172553189 has 2 divisors, whose sum is σ = 172553190. Its totient is φ = 172553188.

The previous prime is 172553177. The next prime is 172553191. The reversal of 172553189 is 981355271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172528225 + 24964 = 13135^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 172553189 - 2²⁴ = 155775973 is a prime.

It is a Sophie Germain prime.

Together with 172553191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172553149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86276594 + 86276595.

It is an arithmetic number, because the mean of its divisors is an integer number (86276595).

Almost surely, 2^172553189 is an apocalyptic number.

It is an amenable number.

172553189 is a deficient number, since it is larger than the sum of its proper divisors (1).

172553189 is an equidigital number, since it uses as much as digits as its factorization.

172553189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 172553189 is about 13135.9502511238. The cubic root of 172553189 is about 556.7253496089.

The spelling of 172553189 in words is "one hundred seventy-two million, five hundred fifty-three thousand, one hundred eighty-nine".