2543749867 has 2 divisors, whose sum is σ = 2543749868. Its totient is φ = 2543749866.

The previous prime is 2543749861. The next prime is 2543749907. The reversal of 2543749867 is 7689473452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543749867 - 2¹⁹ = 2543225579 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543749861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271874933 + 1271874934.

It is an arithmetic number, because the mean of its divisors is an integer number (1271874934).

Almost surely, 2^2543749867 is an apocalyptic number.

2543749867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543749867 is an equidigital number, since it uses as much as digits as its factorization.

2543749867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 55.

The square root of 2543749867 is about 50435.6011860670. The cubic root of 2543749867 is about 1365.0800969158.

The spelling of 2543749867 in words is "two billion, five hundred forty-three million, seven hundred forty-nine thousand, eight hundred sixty-seven".