280886897 has 2 divisors, whose sum is σ = 280886898. Its totient is φ = 280886896.

The previous prime is 280886873. The next prime is 280886911. The reversal of 280886897 is 798688082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268664881 + 12222016 = 16391^2 + 3496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280886897 is a prime.

It is not a weakly prime, because it can be changed into another prime (280886807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140443448 + 140443449.

It is an arithmetic number, because the mean of its divisors is an integer number (140443449).

Almost surely, 2^280886897 is an apocalyptic number.

It is an amenable number.

280886897 is a deficient number, since it is larger than the sum of its proper divisors (1).

280886897 is an equidigital number, since it uses as much as digits as its factorization.

280886897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The square root of 280886897 is about 16759.6806950491. The cubic root of 280886897 is about 654.9032718495.

The spelling of 280886897 in words is "two hundred eighty million, eight hundred eighty-six thousand, eight hundred ninety-seven".