172961873 has 8 divisors (see below), whose sum is σ = 197820480. Its totient is φ = 148140720.

The previous prime is 172961869. The next prime is 172961897. The reversal of 172961873 is 378169271.

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

It is not a de Polignac number, because 172961873 - 2² = 172961869 is a prime.

It is a super-3 number, since 3×172961873³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172961813) 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, 1358 + ... + 18648.

It is an arithmetic number, because the mean of its divisors is an integer number (24727560).

Almost surely, 2^172961873 is an apocalyptic number.

It is an amenable number.

172961873 is a deficient number, since it is larger than the sum of its proper divisors (24858607).

172961873 is a wasteful number, since it uses less digits than its factorization.

172961873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18727.

The product of its digits is 127008, while the sum is 44.

The square root of 172961873 is about 13151.4969870354. The cubic root of 172961873 is about 557.1645288806.

The spelling of 172961873 in words is "one hundred seventy-two million, nine hundred sixty-one thousand, eight hundred seventy-three".