280897 has 2 divisors, whose sum is σ = 280898. Its totient is φ = 280896.

The previous prime is 280883. The next prime is 280909. The reversal of 280897 is 798082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266256 + 14641 = 516^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 280897 - 2⁷ = 280769 is a prime.

It is not a weakly prime, because it can be changed into another prime (280817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140448 + 140449.

It is an arithmetic number, because the mean of its divisors is an integer number (140449).

2²⁸⁰⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

280897 is a deficient number, since it is larger than the sum of its proper divisors (1).

280897 is an equidigital number, since it uses as much as digits as its factorization.

280897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 280897 is about 529.9971698038. The cubic root of 280897 is about 65.4911123656.

The spelling of 280897 in words is "two hundred eighty thousand, eight hundred ninety-seven".