173005989 has 8 divisors (see below), whose sum is σ = 248418912. Its totient is φ = 106465200.

The previous prime is 173005961. The next prime is 173005997. The reversal of 173005989 is 989500371.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 173005989 - 2⁹ = 173005477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173005989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173005489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217987 + ... + 2218064.

It is an arithmetic number, because the mean of its divisors is an integer number (31052364).

Almost surely, 2^173005989 is an apocalyptic number.

It is an amenable number.

173005989 is a deficient number, since it is larger than the sum of its proper divisors (75412923).

173005989 is a wasteful number, since it uses less digits than its factorization.

173005989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436067.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 173005989 is about 13153.1741036147. The cubic root of 173005989 is about 557.2118953520.

The spelling of 173005989 in words is "one hundred seventy-three million, five thousand, nine hundred eighty-nine".