172489 has 2 divisors, whose sum is σ = 172490. Its totient is φ = 172488.

The previous prime is 172441. The next prime is 172507. The reversal of 172489 is 984271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 8464 = 405^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 172489 - 2¹¹ = 170441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172489.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86244 + 86245.

It is an arithmetic number, because the mean of its divisors is an integer number (86245).

2¹⁷²⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

172489 is a deficient number, since it is larger than the sum of its proper divisors (1).

172489 is an equidigital number, since it uses as much as digits as its factorization.

172489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 172489 is about 415.3179504909. The cubic root of 172489 is about 55.6656307949.

The spelling of 172489 in words is "one hundred seventy-two thousand, four hundred eighty-nine".