172892161 has 8 divisors (see below), whose sum is σ = 186320960. Its totient is φ = 159481872.

The previous prime is 172892149. The next prime is 172892183. The reversal of 172892161 is 161298271.

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 172892161 - 2¹⁹ = 172367873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172892161.

It is not an unprimeable number, because it can be changed into a prime (172892101) 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, 19450 + ... + 26908.

It is an arithmetic number, because the mean of its divisors is an integer number (23290120).

Almost surely, 2^172892161 is an apocalyptic number.

It is an amenable number.

172892161 is a deficient number, since it is larger than the sum of its proper divisors (13428799).

172892161 is a wasteful number, since it uses less digits than its factorization.

172892161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255.

The product of its digits is 12096, while the sum is 37.

The square root of 172892161 is about 13148.8463752528. The cubic root of 172892161 is about 557.0896640709.

The spelling of 172892161 in words is "one hundred seventy-two million, eight hundred ninety-two thousand, one hundred sixty-one".