172587897 has 24 divisors (see below), whose sum is σ = 252922176. Its totient is φ = 113396256.

The previous prime is 172587889. The next prime is 172587907. The reversal of 172587897 is 798785271.

It is a happy number.

It is not a de Polignac number, because 172587897 - 2³ = 172587889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172587817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266428 + ... + 267074.

It is an arithmetic number, because the mean of its divisors is an integer number (10538424).

Almost surely, 2^172587897 is an apocalyptic number.

It is an amenable number.

172587897 is a deficient number, since it is larger than the sum of its proper divisors (80334279).

172587897 is a wasteful number, since it uses less digits than its factorization.

172587897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037 (or 1034 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 54.

The square root of 172587897 is about 13137.2712920149. The cubic root of 172587897 is about 556.7626743862.

The spelling of 172587897 in words is "one hundred seventy-two million, five hundred eighty-seven thousand, eight hundred ninety-seven".