281868859 has 2 divisors, whose sum is σ = 281868860. Its totient is φ = 281868858.

The previous prime is 281868817. The next prime is 281868863. The reversal of 281868859 is 958868182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281868859 - 2⁷ = 281868731 is a prime.

It is not a weakly prime, because it can be changed into another prime (281868889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140934429 + 140934430.

It is an arithmetic number, because the mean of its divisors is an integer number (140934430).

Almost surely, 2^281868859 is an apocalyptic number.

281868859 is a deficient number, since it is larger than the sum of its proper divisors (1).

281868859 is an equidigital number, since it uses as much as digits as its factorization.

281868859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2211840, while the sum is 55.

The square root of 281868859 is about 16788.9505032328. The cubic root of 281868859 is about 655.6655504100.

The spelling of 281868859 in words is "two hundred eighty-one million, eight hundred sixty-eight thousand, eight hundred fifty-nine".