2781967 has 4 divisors (see below), whose sum is σ = 2785536. Its totient is φ = 2778400.

The previous prime is 2781959. The next prime is 2781983. The reversal of 2781967 is 7691872.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2781967 - 2³ = 2781959 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 (2781937) 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, 58 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (696384).

2^2781967 is an apocalyptic number.

2781967 is a deficient number, since it is larger than the sum of its proper divisors (3569).

2781967 is a wasteful number, since it uses less digits than its factorization.

2781967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568.

The product of its digits is 42336, while the sum is 40.

The square root of 2781967 is about 1667.9229598516. The cubic root of 2781967 is about 140.6427419261.

The spelling of 2781967 in words is "two million, seven hundred eighty-one thousand, nine hundred sixty-seven".