2691871943 has 2 divisors, whose sum is σ = 2691871944. Its totient is φ = 2691871942.

The previous prime is 2691871921. The next prime is 2691871951. The reversal of 2691871943 is 3491781962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2691871943 - 2⁶ = 2691871879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2691871891 and 2691871900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691871243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345935971 + 1345935972.

It is an arithmetic number, because the mean of its divisors is an integer number (1345935972).

Almost surely, 2^2691871943 is an apocalyptic number.

2691871943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691871943 is an equidigital number, since it uses as much as digits as its factorization.

2691871943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 2691871943 is about 51883.2530109668. The cubic root of 2691871943 is about 1391.0779456456.

The spelling of 2691871943 in words is "two billion, six hundred ninety-one million, eight hundred seventy-one thousand, nine hundred forty-three".