280874897 has 2 divisors, whose sum is σ = 280874898. Its totient is φ = 280874896.

The previous prime is 280874879. The next prime is 280874899. The reversal of 280874897 is 798478082.

It is a happy number.

Together with previous prime (280874879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280864081 + 10816 = 16759^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 280874897 - 2¹² = 280870801 is a prime.

Together with 280874899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280874899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140437448 + 140437449.

It is an arithmetic number, because the mean of its divisors is an integer number (140437449).

Almost surely, 2^280874897 is an apocalyptic number.

It is an amenable number.

280874897 is a deficient number, since it is larger than the sum of its proper divisors (1).

280874897 is an equidigital number, since it uses as much as digits as its factorization.

280874897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The square root of 280874897 is about 16759.3226891781. The cubic root of 280874897 is about 654.8939454964.

The spelling of 280874897 in words is "two hundred eighty million, eight hundred seventy-four thousand, eight hundred ninety-seven".