2543749897 has 16 divisors (see below), whose sum is σ = 2780603280. Its totient is φ = 2312865792.

The previous prime is 2543749867. The next prime is 2543749907. The reversal of 2543749897 is 7989473452.

2543749897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 80712256 + 2463037641 = 8984^2 + 49629^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543749897 - 2²³ = 2535361289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2543749807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051233 + ... + 1053649.

It is an arithmetic number, because the mean of its divisors is an integer number (173787705).

Almost surely, 2^2543749897 is an apocalyptic number.

It is an amenable number.

2543749897 is a deficient number, since it is larger than the sum of its proper divisors (236853383).

2543749897 is a wasteful number, since it uses less digits than its factorization.

2543749897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612.

The product of its digits is 15240960, while the sum is 58.

The square root of 2543749897 is about 50435.6014834759. The cubic root of 2543749897 is about 1365.0801022822.

The spelling of 2543749897 in words is "two billion, five hundred forty-three million, seven hundred forty-nine thousand, eight hundred ninety-seven".