172897199 has 8 divisors (see below), whose sum is σ = 181501440. Its totient is φ = 164482200.

The previous prime is 172897171. The next prime is 172897213. The reversal of 172897199 is 991798271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172897199 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 172897199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172897099) 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, 45437 + ... + 49094.

It is an arithmetic number, because the mean of its divisors is an integer number (22687680).

Almost surely, 2^172897199 is an apocalyptic number.

172897199 is a deficient number, since it is larger than the sum of its proper divisors (8604241).

172897199 is an equidigital number, since it uses as much as digits as its factorization.

172897199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94621.

The product of its digits is 571536, while the sum is 53.

The square root of 172897199 is about 13149.0379495992. The cubic root of 172897199 is about 557.0950751327.

The spelling of 172897199 in words is "one hundred seventy-two million, eight hundred ninety-seven thousand, one hundred ninety-nine".