2691943 has 4 divisors (see below), whose sum is σ = 2809008. Its totient is φ = 2574880.

The previous prime is 2691917. The next prime is 2691959. The reversal of 2691943 is 3491962.

2691943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2691943 - 2⁵ = 2691911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2691899 and 2691908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691043) 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 3 ways as a sum of consecutive naturals, for example, 58498 + ... + 58543.

It is an arithmetic number, because the mean of its divisors is an integer number (702252).

2^2691943 is an apocalyptic number.

2691943 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2691943 is a deficient number, since it is larger than the sum of its proper divisors (117065).

2691943 is a wasteful number, since it uses less digits than its factorization.

2691943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117064.

The product of its digits is 11664, while the sum is 34.

The square root of 2691943 is about 1640.7141737670. The cubic root of 2691943 is about 139.1090185574.

It can be divided in two parts, 26919 and 43, that added together give a palindrome (26962).

The spelling of 2691943 in words is "two million, six hundred ninety-one thousand, nine hundred forty-three".