197117285 has 8 divisors (see below), whose sum is σ = 237384216. Its totient is φ = 157131520.

The previous prime is 197117273. The next prime is 197117311. The reversal of 197117285 is 582711791.

It can be written as a sum of positive squares in 4 ways, for example, as 34656769 + 162460516 = 5887^2 + 12746^2 .

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

It is not a de Polignac number, because 197117285 - 2²⁰ = 196068709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68744 + ... + 71553.

It is an arithmetic number, because the mean of its divisors is an integer number (29673027).

Almost surely, 2^197117285 is an apocalyptic number.

It is an amenable number.

197117285 is a deficient number, since it is larger than the sum of its proper divisors (40266931).

197117285 is a wasteful number, since it uses less digits than its factorization.

197117285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140583.

The product of its digits is 35280, while the sum is 41.

The square root of 197117285 is about 14039.8463310679. The cubic root of 197117285 is about 581.9802359423.

The spelling of 197117285 in words is "one hundred ninety-seven million, one hundred seventeen thousand, two hundred eighty-five".