280499 has 2 divisors, whose sum is σ = 280500. Its totient is φ = 280498.

The previous prime is 280487. The next prime is 280507. The reversal of 280499 is 994082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280499 - 2⁸ = 280243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280409) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140249 + 140250.

It is an arithmetic number, because the mean of its divisors is an integer number (140250).

2²⁸⁰⁴⁹⁹ is an apocalyptic number.

280499 is a deficient number, since it is larger than the sum of its proper divisors (1).

280499 is an equidigital number, since it uses as much as digits as its factorization.

280499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 280499 is about 529.6215630051. The cubic root of 280499 is about 65.4601665230.

The spelling of 280499 in words is "two hundred eighty thousand, four hundred ninety-nine".