172471897 has 8 divisors (see below), whose sum is σ = 185864840. Its totient is φ = 159096960.

The previous prime is 172471883. The next prime is 172471913. The reversal of 172471897 is 798174271.

It can be written as a sum of positive squares in 4 ways, for example, as 2143296 + 170328601 = 1464^2 + 13051^2 .

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 172471897 - 2⁷ = 172471769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172471807) 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, 20629 + ... + 27757.

It is an arithmetic number, because the mean of its divisors is an integer number (23233105).

Almost surely, 2^172471897 is an apocalyptic number.

It is an amenable number.

172471897 is a deficient number, since it is larger than the sum of its proper divisors (13392943).

172471897 is a wasteful number, since it uses less digits than its factorization.

172471897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9003.

The product of its digits is 197568, while the sum is 46.

The square root of 172471897 is about 13132.8556300601. The cubic root of 172471897 is about 556.6379090805.

The spelling of 172471897 in words is "one hundred seventy-two million, four hundred seventy-one thousand, eight hundred ninety-seven".