6223747921 has 2 divisors, whose sum is σ = 6223747922. Its totient is φ = 6223747920.

The previous prime is 6223747909. The next prime is 6223747961. The reversal of 6223747921 is 1297473226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5345218321 + 878529600 = 73111^2 + 29640^2 .

It is a cyclic number.

It is not a de Polignac number, because 6223747921 - 2¹¹ = 6223745873 is a prime.

It is not a weakly prime, because it can be changed into another prime (6223747961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3111873960 + 3111873961.

It is an arithmetic number, because the mean of its divisors is an integer number (3111873961).

Almost surely, 2^6223747921 is an apocalyptic number.

It is an amenable number.

6223747921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6223747921 is an equidigital number, since it uses as much as digits as its factorization.

6223747921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 6223747921 is about 78890.7340630064. The cubic root of 6223747921 is about 1839.4331036558.

The spelling of 6223747921 in words is "six billion, two hundred twenty-three million, seven hundred forty-seven thousand, nine hundred twenty-one".