280297 has 2 divisors, whose sum is σ = 280298. Its totient is φ = 280296.

The previous prime is 280277. The next prime is 280303. The reversal of 280297 is 792082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207936 + 72361 = 456^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 280297 - 2¹⁵ = 247529 is a prime.

It is not a weakly prime, because it can be changed into another prime (280207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140148 + 140149.

It is an arithmetic number, because the mean of its divisors is an integer number (140149).

2²⁸⁰²⁹⁷ is an apocalyptic number.

It is an amenable number.

280297 is a deficient number, since it is larger than the sum of its proper divisors (1).

280297 is an equidigital number, since it uses as much as digits as its factorization.

280297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 280297 is about 529.4308264542. The cubic root of 280297 is about 65.4444491419. Note that the first 5 decimals are identical.

The spelling of 280297 in words is "two hundred eighty thousand, two hundred ninety-seven".