5243878987 has 4 divisors (see below), whose sum is σ = 5246287720. Its totient is φ = 5241470256.

The previous prime is 5243878963. The next prime is 5243878999. The reversal of 5243878987 is 7898783425.

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-5243878987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5243878907) 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, 1201098 + ... + 1205455.

It is an arithmetic number, because the mean of its divisors is an integer number (1311571930).

Almost surely, 2^5243878987 is an apocalyptic number.

5243878987 is a deficient number, since it is larger than the sum of its proper divisors (2408733).

5243878987 is a wasteful number, since it uses less digits than its factorization.

5243878987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408732.

The product of its digits is 27095040, while the sum is 61.

The square root of 5243878987 is about 72414.6324094792. The cubic root of 5243878987 is about 1737.3376056633.

The spelling of 5243878987 in words is "five billion, two hundred forty-three million, eight hundred seventy-eight thousand, nine hundred eighty-seven".