2781113 has 4 divisors (see below), whose sum is σ = 2790480. Its totient is φ = 2771748.

The previous prime is 2781109. The next prime is 2781133. The reversal of 2781113 is 3111872.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2781113 - 2² = 2781109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (697620).

2^2781113 is an apocalyptic number.

It is an amenable number.

2781113 is a deficient number, since it is larger than the sum of its proper divisors (9367).

2781113 is an equidigital number, since it uses as much as digits as its factorization.

2781113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9366.

The product of its digits is 336, while the sum is 23.

The square root of 2781113 is about 1667.6669331734. Note that the first 3 decimals coincide. The cubic root of 2781113 is about 140.6283490890.

Adding to 2781113 its reverse (3111872), we get a palindrome (5892985).

The spelling of 2781113 in words is "two million, seven hundred eighty-one thousand, one hundred thirteen".