281940899 has 2 divisors, whose sum is σ = 281940900. Its totient is φ = 281940898.

The previous prime is 281940863. The next prime is 281940913. The reversal of 281940899 is 998049182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281940899 - 2⁸ = 281940643 is a prime.

It is a super-3 number, since 3×281940899³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281940859) 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, 140970449 + 140970450.

It is an arithmetic number, because the mean of its divisors is an integer number (140970450).

Almost surely, 2^281940899 is an apocalyptic number.

281940899 is a deficient number, since it is larger than the sum of its proper divisors (1).

281940899 is an equidigital number, since it uses as much as digits as its factorization.

281940899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 281940899 is about 16791.0958248710. The cubic root of 281940899 is about 655.7214039524.

The spelling of 281940899 in words is "two hundred eighty-one million, nine hundred forty thousand, eight hundred ninety-nine".