280025047 has 2 divisors, whose sum is σ = 280025048. Its totient is φ = 280025046.

The previous prime is 280025029. The next prime is 280025089. The reversal of 280025047 is 740520082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280025047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280025017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140012523 + 140012524.

It is an arithmetic number, because the mean of its divisors is an integer number (140012524).

Almost surely, 2^280025047 is an apocalyptic number.

280025047 is a deficient number, since it is larger than the sum of its proper divisors (1).

280025047 is an equidigital number, since it uses as much as digits as its factorization.

280025047 is an evil number, because the sum of its binary digits is even.

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

The square root of 280025047 is about 16733.9489362194. The cubic root of 280025047 is about 654.2327686937.

The spelling of 280025047 in words is "two hundred eighty million, twenty-five thousand, forty-seven".