2543981479 has 4 divisors (see below), whose sum is σ = 2739672376. Its totient is φ = 2348290584.

The previous prime is 2543981399. The next prime is 2543981501. The reversal of 2543981479 is 9741893452.

2543981479 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 a de Polignac number, because none of the positive numbers 2^k-2543981479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543988479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97845429 + ... + 97845454.

It is an arithmetic number, because the mean of its divisors is an integer number (684918094).

Almost surely, 2^2543981479 is an apocalyptic number.

2543981479 is a deficient number, since it is larger than the sum of its proper divisors (195690897).

2543981479 is a wasteful number, since it uses less digits than its factorization.

2543981479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195690896.

The product of its digits is 2177280, while the sum is 52.

The square root of 2543981479 is about 50437.8972499846. The cubic root of 2543981479 is about 1365.1215264788.

The spelling of 2543981479 in words is "two billion, five hundred forty-three million, nine hundred eighty-one thousand, four hundred seventy-nine".