173297897 has 2 divisors, whose sum is σ = 173297898. Its totient is φ = 173297896.

The previous prime is 173297867. The next prime is 173297909. The reversal of 173297897 is 798792371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156150016 + 17147881 = 12496^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 173297897 - 2¹⁴ = 173281513 is a prime.

It is a super-2 number, since 2×173297897² = 60064322209245218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173297807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86648948 + 86648949.

It is an arithmetic number, because the mean of its divisors is an integer number (86648949).

Almost surely, 2^173297897 is an apocalyptic number.

It is an amenable number.

173297897 is a deficient number, since it is larger than the sum of its proper divisors (1).

173297897 is an equidigital number, since it uses as much as digits as its factorization.

173297897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 53.

The square root of 173297897 is about 13164.2659119299. The cubic root of 173297897 is about 557.5251084296.

The spelling of 173297897 in words is "one hundred seventy-three million, two hundred ninety-seven thousand, eight hundred ninety-seven".