281728907 has 2 divisors, whose sum is σ = 281728908. Its totient is φ = 281728906.

The previous prime is 281728901. The next prime is 281728969. The reversal of 281728907 is 709827182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281728907 - 2⁴ = 281728891 is a prime.

It is not a weakly prime, because it can be changed into another prime (281728901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140864453 + 140864454.

It is an arithmetic number, because the mean of its divisors is an integer number (140864454).

Almost surely, 2^281728907 is an apocalyptic number.

281728907 is a deficient number, since it is larger than the sum of its proper divisors (1).

281728907 is an equidigital number, since it uses as much as digits as its factorization.

281728907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 281728907 is about 16784.7820063294. The cubic root of 281728907 is about 655.5570166086.

The spelling of 281728907 in words is "two hundred eighty-one million, seven hundred twenty-eight thousand, nine hundred seven".