8543978279 has 8 divisors (see below), whose sum is σ = 8573363952. Its totient is φ = 8514633600.

The previous prime is 8543978263. The next prime is 8543978297. The reversal of 8543978279 is 9728793458.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8543978279 - 2⁴ = 8543978263 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 (8543978239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440837 + ... + 459809.

It is an arithmetic number, because the mean of its divisors is an integer number (1071670494).

Almost surely, 2^8543978279 is an apocalyptic number.

8543978279 is a deficient number, since it is larger than the sum of its proper divisors (29385673).

8543978279 is a wasteful number, since it uses less digits than its factorization.

8543978279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20497.

The product of its digits is 30481920, while the sum is 62.

The square root of 8543978279 is about 92433.6425713063. The cubic root of 8543978279 is about 2044.3411877013.

The spelling of 8543978279 in words is "eight billion, five hundred forty-three million, nine hundred seventy-eight thousand, two hundred seventy-nine".