8078388947 has 4 divisors (see below), whose sum is σ = 8079167880. Its totient is φ = 8077610016.

The previous prime is 8078388919. The next prime is 8078388961. The reversal of 8078388947 is 7498838708.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8078388947 - 2¹⁶ = 8078323411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8078388947.

It is not an unprimeable number, because it can be changed into a prime (8078388977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373697 + ... + 394722.

It is an arithmetic number, because the mean of its divisors is an integer number (2019791970).

Almost surely, 2^8078388947 is an apocalyptic number.

8078388947 is a deficient number, since it is larger than the sum of its proper divisors (778933).

8078388947 is a wasteful number, since it uses less digits than its factorization.

8078388947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778932.

The product of its (nonzero) digits is 21676032, while the sum is 62.

The square root of 8078388947 is about 89879.8584055404. The cubic root of 8078388947 is about 2006.5111914392.

The spelling of 8078388947 in words is "eight billion, seventy-eight million, three hundred eighty-eight thousand, nine hundred forty-seven".