6847978499 has 4 divisors (see below), whose sum is σ = 7208398440. Its totient is φ = 6487558560.

The previous prime is 6847978469. The next prime is 6847978513. The reversal of 6847978499 is 9948797486.

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 6847978499 - 2¹² = 6847974403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6847978469) 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, 180209942 + ... + 180209979.

It is an arithmetic number, because the mean of its divisors is an integer number (1802099610).

Almost surely, 2^6847978499 is an apocalyptic number.

6847978499 is a deficient number, since it is larger than the sum of its proper divisors (360419941).

6847978499 is a wasteful number, since it uses less digits than its factorization.

6847978499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360419940.

The product of its digits is 219469824, while the sum is 71.

The square root of 6847978499 is about 82752.5135509490. The cubic root of 6847978499 is about 1898.9817719633.

The spelling of 6847978499 in words is "six billion, eight hundred forty-seven million, nine hundred seventy-eight thousand, four hundred ninety-nine".