6847721069 has 8 divisors (see below), whose sum is σ = 8166226560. Its totient is φ = 5614280496.

The previous prime is 6847721059. The next prime is 6847721107. The reversal of 6847721069 is 9601277486.

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

It is not a de Polignac number, because 6847721069 - 2²⁸ = 6579285613 is a prime.

It is a super-2 number, since 2×6847721069² = 93782567677653005522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6847721059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21266054 + ... + 21266375.

It is an arithmetic number, because the mean of its divisors is an integer number (1020778320).

Almost surely, 2^6847721069 is an apocalyptic number.

It is an amenable number.

6847721069 is a deficient number, since it is larger than the sum of its proper divisors (1318505491).

6847721069 is a wasteful number, since it uses less digits than its factorization.

6847721069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42532459.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 6847721069 is about 82750.9581152992. The cubic root of 6847721069 is about 1898.9579760843.

The spelling of 6847721069 in words is "six billion, eight hundred forty-seven million, seven hundred twenty-one thousand, sixty-nine".