173609489 has 2 divisors, whose sum is σ = 173609490. Its totient is φ = 173609488.

The previous prime is 173609461. The next prime is 173609509. The reversal of 173609489 is 984906371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104387089 + 69222400 = 10217^2 + 8320^2 .

It is an emirp because it is prime and its reverse (984906371) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173609489 is a prime.

It is a super-2 number, since 2×173609489² = 60280509341682242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173609419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86804744 + 86804745.

It is an arithmetic number, because the mean of its divisors is an integer number (86804745).

Almost surely, 2^173609489 is an apocalyptic number.

It is an amenable number.

173609489 is a deficient number, since it is larger than the sum of its proper divisors (1).

173609489 is an equidigital number, since it uses as much as digits as its factorization.

173609489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 173609489 is about 13176.0953624357. The cubic root of 173609489 is about 557.8590542983.

The spelling of 173609489 in words is "one hundred seventy-three million, six hundred nine thousand, four hundred eighty-nine".