6223991647 has 2 divisors, whose sum is σ = 6223991648. Its totient is φ = 6223991646.

The previous prime is 6223991639. The next prime is 6223991677. The reversal of 6223991647 is 7461993226.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6223991647 - 2³ = 6223991639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6223991647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6223991617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3111995823 + 3111995824.

It is an arithmetic number, because the mean of its divisors is an integer number (3111995824).

Almost surely, 2^6223991647 is an apocalyptic number.

6223991647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6223991647 is an equidigital number, since it uses as much as digits as its factorization.

6223991647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 6223991647 is about 78892.2787540074. The cubic root of 6223991647 is about 1839.4571144730.

The spelling of 6223991647 in words is "six billion, two hundred twenty-three million, nine hundred ninety-one thousand, six hundred forty-seven".