280864307 has 2 divisors, whose sum is σ = 280864308. Its totient is φ = 280864306.

The previous prime is 280864303. The next prime is 280864319. The reversal of 280864307 is 703468082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280864307 - 2² = 280864303 is a prime.

It is not a weakly prime, because it can be changed into another prime (280864301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140432153 + 140432154.

It is an arithmetic number, because the mean of its divisors is an integer number (140432154).

Almost surely, 2^280864307 is an apocalyptic number.

280864307 is a deficient number, since it is larger than the sum of its proper divisors (1).

280864307 is an equidigital number, since it uses as much as digits as its factorization.

280864307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 280864307 is about 16759.0067426444. The cubic root of 280864307 is about 654.8857147691.

The spelling of 280864307 in words is "two hundred eighty million, eight hundred sixty-four thousand, three hundred seven".