173372389 has 2 divisors, whose sum is σ = 173372390. Its totient is φ = 173372388.

The previous prime is 173372387. The next prime is 173372393. The reversal of 173372389 is 983273371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173369889 + 2500 = 13167^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 173372389 - 2¹ = 173372387 is a prime.

Together with 173372387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173372387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86686194 + 86686195.

It is an arithmetic number, because the mean of its divisors is an integer number (86686195).

Almost surely, 2^173372389 is an apocalyptic number.

It is an amenable number.

173372389 is a deficient number, since it is larger than the sum of its proper divisors (1).

173372389 is an equidigital number, since it uses as much as digits as its factorization.

173372389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 173372389 is about 13167.0949339632. The cubic root of 173372389 is about 557.6049809340.

The spelling of 173372389 in words is "one hundred seventy-three million, three hundred seventy-two thousand, three hundred eighty-nine".