172485289 has 2 divisors, whose sum is σ = 172485290. Its totient is φ = 172485288.

The previous prime is 172485283. The next prime is 172485311. The reversal of 172485289 is 982584271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142014889 + 30470400 = 11917^2 + 5520^2 .

It is a cyclic number.

It is not a de Polignac number, because 172485289 - 2¹⁵ = 172452521 is a prime.

It is not a weakly prime, because it can be changed into another prime (172485283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86242644 + 86242645.

It is an arithmetic number, because the mean of its divisors is an integer number (86242645).

Almost surely, 2^172485289 is an apocalyptic number.

It is an amenable number.

172485289 is a deficient number, since it is larger than the sum of its proper divisors (1).

172485289 is an equidigital number, since it uses as much as digits as its factorization.

172485289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 172485289 is about 13133.3654864243. The cubic root of 172485289 is about 556.6523158758.

The spelling of 172485289 in words is "one hundred seventy-two million, four hundred eighty-five thousand, two hundred eighty-nine".