281494789 has 16 divisors (see below), whose sum is σ = 305054640. Its totient is φ = 258785280.

The previous prime is 281494783. The next prime is 281494817. The reversal of 281494789 is 987494182.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13616100 + 267878689 = 3690^2 + 16367^2 .

It is a cyclic number.

It is not a de Polignac number, because 281494789 - 2¹⁵ = 281462021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281494783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134229 + ... + 136309.

It is an arithmetic number, because the mean of its divisors is an integer number (19065915).

Almost surely, 2^281494789 is an apocalyptic number.

It is an amenable number.

281494789 is a deficient number, since it is larger than the sum of its proper divisors (23559851).

281494789 is a wasteful number, since it uses less digits than its factorization.

281494789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

The product of its digits is 1161216, while the sum is 52.

The square root of 281494789 is about 16777.8064418445. The cubic root of 281494789 is about 655.3753759995.

The spelling of 281494789 in words is "two hundred eighty-one million, four hundred ninety-four thousand, seven hundred eighty-nine".