172708973 has 8 divisors (see below), whose sum is σ = 178512768. Its totient is φ = 166993984.

The previous prime is 172708969. The next prime is 172708979. The reversal of 172708973 is 379807271.

172708973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172708973 - 2² = 172708969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172708979) 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, 18236 + ... + 26037.

It is an arithmetic number, because the mean of its divisors is an integer number (22314096).

Almost surely, 2^172708973 is an apocalyptic number.

It is an amenable number.

172708973 is a deficient number, since it is larger than the sum of its proper divisors (5803795).

172708973 is an equidigital number, since it uses as much as digits as its factorization.

172708973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44403.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 172708973 is about 13141.8785947824. The cubic root of 172708973 is about 556.8928396359.

The spelling of 172708973 in words is "one hundred seventy-two million, seven hundred eight thousand, nine hundred seventy-three".