2766391 has 4 divisors (see below), whose sum is σ = 2773384. Its totient is φ = 2759400.

The previous prime is 2766389. The next prime is 2766431. The reversal of 2766391 is 1936672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2766391 - 2¹ = 2766389 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 (2766301) 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, 2865 + ... + 3706.

It is an arithmetic number, because the mean of its divisors is an integer number (693346).

2^2766391 is an apocalyptic number.

2766391 is a deficient number, since it is larger than the sum of its proper divisors (6993).

2766391 is an equidigital number, since it uses as much as digits as its factorization.

2766391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992.

The product of its digits is 13608, while the sum is 34.

The square root of 2766391 is about 1663.2471253545. The cubic root of 2766391 is about 140.3797682175.

The spelling of 2766391 in words is "two million, seven hundred sixty-six thousand, three hundred ninety-one".