173987973 has 8 divisors (see below), whose sum is σ = 257760000. Its totient is φ = 115991964.

The previous prime is 173987951. The next prime is 173987987. The reversal of 173987973 is 379789371.

It is a happy number.

173987973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 173987973 - 2⁹ = 173987461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173987573) 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, 3221973 + ... + 3222026.

It is an arithmetic number, because the mean of its divisors is an integer number (32220000).

Almost surely, 2^173987973 is an apocalyptic number.

It is an amenable number.

173987973 is a deficient number, since it is larger than the sum of its proper divisors (83772027).

173987973 is an equidigital number, since it uses as much as digits as its factorization.

173987973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444008 (or 6444002 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 173987973 is about 13190.4500681364. The cubic root of 173987973 is about 558.2641540387.

The spelling of 173987973 in words is "one hundred seventy-three million, nine hundred eighty-seven thousand, nine hundred seventy-three".