280560971 has 2 divisors, whose sum is σ = 280560972. Its totient is φ = 280560970.

The previous prime is 280560961. The next prime is 280561009. The reversal of 280560971 is 179065082.

It is an a-pointer prime, because the next prime (280561009) can be obtained adding 280560971 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280560971 is a prime.

It is not a weakly prime, because it can be changed into another prime (280560901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140280485 + 140280486.

It is an arithmetic number, because the mean of its divisors is an integer number (140280486).

Almost surely, 2^280560971 is an apocalyptic number.

280560971 is a deficient number, since it is larger than the sum of its proper divisors (1).

280560971 is an equidigital number, since it uses as much as digits as its factorization.

280560971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 280560971 is about 16749.9543581468. The cubic root of 280560971 is about 654.6498690055.

The spelling of 280560971 in words is "two hundred eighty million, five hundred sixty thousand, nine hundred seventy-one".