172961871 has 8 divisors (see below), whose sum is σ = 230687280. Its totient is φ = 115272192.

The previous prime is 172961869. The next prime is 172961897. The reversal of 172961871 is 178169271.

172961871 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 172961871 - 2¹ = 172961869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172961801) 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, 5871 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (28835910).

Almost surely, 2^172961871 is an apocalyptic number.

172961871 is a deficient number, since it is larger than the sum of its proper divisors (57725409).

172961871 is a wasteful number, since it uses less digits than its factorization.

172961871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17865.

The product of its digits is 42336, while the sum is 42.

The square root of 172961871 is about 13151.4969109984. The cubic root of 172961871 is about 557.1645267330.

The spelling of 172961871 in words is "one hundred seventy-two million, nine hundred sixty-one thousand, eight hundred seventy-one".