280500247 has 2 divisors, whose sum is σ = 280500248. Its totient is φ = 280500246.

The previous prime is 280500191. The next prime is 280500263. The reversal of 280500247 is 742005082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280500247 - 2²⁷ = 146282519 is a prime.

It is a super-2 number, since 2×280500247² = 157360777134122018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280500947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140250123 + 140250124.

It is an arithmetic number, because the mean of its divisors is an integer number (140250124).

Almost surely, 2^280500247 is an apocalyptic number.

280500247 is a deficient number, since it is larger than the sum of its proper divisors (1).

280500247 is an equidigital number, since it uses as much as digits as its factorization.

280500247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 280500247 is about 16748.1415983983. The cubic root of 280500247 is about 654.6026352712.

The spelling of 280500247 in words is "two hundred eighty million, five hundred thousand, two hundred forty-seven".