280563247 has 2 divisors, whose sum is σ = 280563248. Its totient is φ = 280563246.

The previous prime is 280563221. The next prime is 280563251. The reversal of 280563247 is 742365082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280563247 - 2²⁷ = 146345519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280563277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140281623 + 140281624.

It is an arithmetic number, because the mean of its divisors is an integer number (140281624).

Almost surely, 2^280563247 is an apocalyptic number.

280563247 is a deficient number, since it is larger than the sum of its proper divisors (1).

280563247 is an equidigital number, since it uses as much as digits as its factorization.

280563247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 280563247 is about 16750.0222984926. The cubic root of 280563247 is about 654.6516392435.

The spelling of 280563247 in words is "two hundred eighty million, five hundred sixty-three thousand, two hundred forty-seven".