173390389 has 4 divisors (see below), whose sum is σ = 173435724. Its totient is φ = 173345056.

The previous prime is 173390383. The next prime is 173390411. The reversal of 173390389 is 983093371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983093371 = 13 ⋅75622567.

It can be written as a sum of positive squares in 2 ways, for example, as 138462289 + 34928100 = 11767^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 173390389 - 2³ = 173390381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173390381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16342 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (43358931).

Almost surely, 2^173390389 is an apocalyptic number.

It is an amenable number.

173390389 is a deficient number, since it is larger than the sum of its proper divisors (45335).

173390389 is an equidigital number, since it uses as much as digits as its factorization.

173390389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45334.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 173390389 is about 13167.7784382940. The cubic root of 173390389 is about 557.6242776289.

The spelling of 173390389 in words is "one hundred seventy-three million, three hundred ninety thousand, three hundred eighty-nine".