280339 has 2 divisors, whose sum is σ = 280340. Its totient is φ = 280338.

The previous prime is 280337. The next prime is 280351. The reversal of 280339 is 933082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280339 - 2¹ = 280337 is a prime.

Together with 280337, it forms a pair of twin primes.

280339 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (280337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140169 + 140170.

It is an arithmetic number, because the mean of its divisors is an integer number (140170).

2²⁸⁰³³⁹ is an apocalyptic number.

280339 is a deficient number, since it is larger than the sum of its proper divisors (1).

280339 is an equidigital number, since it uses as much as digits as its factorization.

280339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 280339 is about 529.4704902070. The cubic root of 280339 is about 65.4477177338.

The spelling of 280339 in words is "two hundred eighty thousand, three hundred thirty-nine".