2697891 has 12 divisors (see below), whose sum is σ = 4184712. Its totient is φ = 1541568.

The previous prime is 2697887. The next prime is 2697911. The reversal of 2697891 is 1987962.

It is not a de Polignac number, because 2697891 - 2² = 2697887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2697491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9030 + ... + 9323.

It is an arithmetic number, because the mean of its divisors is an integer number (348726).

2^2697891 is an apocalyptic number.

2697891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2697891 is a deficient number, since it is larger than the sum of its proper divisors (1486821).

2697891 is a wasteful number, since it uses less digits than its factorization.

2697891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370 (or 18363 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 2697891 is about 1642.5257988841. The cubic root of 2697891 is about 139.2113995982.

The spelling of 2697891 in words is "two million, six hundred ninety-seven thousand, eight hundred ninety-one".