281409943 has 2 divisors, whose sum is σ = 281409944. Its totient is φ = 281409942.

The previous prime is 281409907. The next prime is 281410001. The reversal of 281409943 is 349904182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281409943 - 2⁹ = 281409431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281409896 and 281409905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281409343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140704971 + 140704972.

It is an arithmetic number, because the mean of its divisors is an integer number (140704972).

Almost surely, 2^281409943 is an apocalyptic number.

281409943 is a deficient number, since it is larger than the sum of its proper divisors (1).

281409943 is an equidigital number, since it uses as much as digits as its factorization.

281409943 is an evil number, because the sum of its binary digits is even.

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

The square root of 281409943 is about 16775.2777324252. The cubic root of 281409943 is about 655.3095233099.

It can be divided in two parts, 28140 and 9943, that added together give a palindrome (38083).

The spelling of 281409943 in words is "two hundred eighty-one million, four hundred nine thousand, nine hundred forty-three".