280487 has 2 divisors, whose sum is σ = 280488. Its totient is φ = 280486.

The previous prime is 280463. The next prime is 280499. The reversal of 280487 is 784082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280487 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 8³ + 4⁹ + 0 + 8³ + 7⁵ .

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 280487.

It is not a weakly prime, because it can be changed into another prime (280187) 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, 140243 + 140244.

It is an arithmetic number, because the mean of its divisors is an integer number (140244).

2²⁸⁰⁴⁸⁷ is an apocalyptic number.

280487 is a deficient number, since it is larger than the sum of its proper divisors (1).

280487 is an equidigital number, since it uses as much as digits as its factorization.

280487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 280487 is about 529.6102340401. The cubic root of 280487 is about 65.4592330280.

It can be divided in two parts, 280 and 487, that added together give a palindrome (767).

The spelling of 280487 in words is "two hundred eighty thousand, four hundred eighty-seven".