281397859 has 2 divisors, whose sum is σ = 281397860. Its totient is φ = 281397858.

The previous prime is 281397841. The next prime is 281397871. The reversal of 281397859 is 958793182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281397859 - 2⁷ = 281397731 is a prime.

It is not a weakly prime, because it can be changed into another prime (281397899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140698929 + 140698930.

It is an arithmetic number, because the mean of its divisors is an integer number (140698930).

Almost surely, 2^281397859 is an apocalyptic number.

281397859 is a deficient number, since it is larger than the sum of its proper divisors (1).

281397859 is an equidigital number, since it uses as much as digits as its factorization.

281397859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 52.

The square root of 281397859 is about 16774.9175556841. The cubic root of 281397859 is about 655.3001433125.

The spelling of 281397859 in words is "two hundred eighty-one million, three hundred ninety-seven thousand, eight hundred fifty-nine".