2781493 has 16 divisors (see below), whose sum is σ = 3338496. Its totient is φ = 2283840.

The previous prime is 2781491. The next prime is 2781497. The reversal of 2781493 is 3941872.

2781493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2781493 - 2¹ = 2781491 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 (2781491) 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, 7396 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (208656).

2^2781493 is an apocalyptic number.

It is an amenable number.

2781493 is a deficient number, since it is larger than the sum of its proper divisors (557003).

2781493 is a wasteful number, since it uses less digits than its factorization.

2781493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 12096, while the sum is 34.

The square root of 2781493 is about 1667.7808609047. The cubic root of 2781493 is about 140.6347537597.

It can be divided in two parts, 278 and 1493, that added together give a palindrome (1771).

The spelling of 2781493 in words is "two million, seven hundred eighty-one thousand, four hundred ninety-three".