280197 has 12 divisors (see below), whose sum is σ = 409344. Its totient is φ = 184680.

The previous prime is 280187. The next prime is 280199. The reversal of 280197 is 791082.

It is not a de Polignac number, because 280197 - 2⁷ = 280069 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

280197 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 280197.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280197.

It is not an unprimeable number, because it can be changed into a prime (280199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1372 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (34112).

2²⁸⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

280197 is a deficient number, since it is larger than the sum of its proper divisors (129147).

280197 is a wasteful number, since it uses less digits than its factorization.

280197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 280197 is about 529.3363769854. The cubic root of 280197 is about 65.4366654656.

The spelling of 280197 in words is "two hundred eighty thousand, one hundred ninety-seven".