173216897 has 4 divisors (see below), whose sum is σ = 197962176. Its totient is φ = 148471620.

The previous prime is 173216891. The next prime is 173216899. The reversal of 173216897 is 798612371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 173216897 - 2⁶ = 173216833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173216891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12372629 + ... + 12372642.

It is an arithmetic number, because the mean of its divisors is an integer number (49490544).

Almost surely, 2^173216897 is an apocalyptic number.

It is an amenable number.

173216897 is a deficient number, since it is larger than the sum of its proper divisors (24745279).

173216897 is an equidigital number, since it uses as much as digits as its factorization.

173216897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24745278.

The product of its digits is 127008, while the sum is 44.

The square root of 173216897 is about 13161.1890420281. The cubic root of 173216897 is about 557.4382318772.

The spelling of 173216897 in words is "one hundred seventy-three million, two hundred sixteen thousand, eight hundred ninety-seven".