173072861 has 8 divisors (see below), whose sum is σ = 194490240. Its totient is φ = 152813232.

The previous prime is 173072839. The next prime is 173072891. The reversal of 173072861 is 168270371.

173072861 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 not a de Polignac number, because 173072861 - 2²² = 168878557 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 (173072831) 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, 289121 + ... + 289718.

It is an arithmetic number, because the mean of its divisors is an integer number (24311280).

Almost surely, 2^173072861 is an apocalyptic number.

It is an amenable number.

173072861 is a deficient number, since it is larger than the sum of its proper divisors (21417379).

173072861 is a wasteful number, since it uses less digits than its factorization.

173072861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578875.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 173072861 is about 13155.7159060235. The cubic root of 173072861 is about 557.2836791366.

The spelling of 173072861 in words is "one hundred seventy-three million, seventy-two thousand, eight hundred sixty-one".