171089972 has 24 divisors (see below), whose sum is σ = 318059784. Its totient is φ = 80248832.

The previous prime is 171089959. The next prime is 171089977. The reversal of 171089972 is 279980171.

It can be written as a sum of positive squares in 4 ways, for example, as 56942116 + 114147856 = 7546^2 + 10684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171089977) 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, 17588 + ... + 25524.

It is an arithmetic number, because the mean of its divisors is an integer number (13252491).

Almost surely, 2^171089972 is an apocalyptic number.

It is an amenable number.

171089972 is a deficient number, since it is larger than the sum of its proper divisors (146969812).

171089972 is a wasteful number, since it uses less digits than its factorization.

171089972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275 (or 8273 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 171089972 is about 13080.1365436298. The cubic root of 171089972 is about 555.1472401052.

The spelling of 171089972 in words is "one hundred seventy-one million, eighty-nine thousand, nine hundred seventy-two".