281922439 has 2 divisors, whose sum is σ = 281922440. Its totient is φ = 281922438.

The previous prime is 281922413. The next prime is 281922451. The reversal of 281922439 is 934229182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281922439 is a prime.

It is a super-2 number, since 2×281922439² = 158960523223417442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281922139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140961219 + 140961220.

It is an arithmetic number, because the mean of its divisors is an integer number (140961220).

Almost surely, 2^281922439 is an apocalyptic number.

281922439 is a deficient number, since it is larger than the sum of its proper divisors (1).

281922439 is an equidigital number, since it uses as much as digits as its factorization.

281922439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 281922439 is about 16790.5461197663. The cubic root of 281922439 is about 655.7070925827.

The spelling of 281922439 in words is "two hundred eighty-one million, nine hundred twenty-two thousand, four hundred thirty-nine".