6421053823 has 2 divisors, whose sum is σ = 6421053824. Its totient is φ = 6421053822.

The previous prime is 6421053791. The next prime is 6421053841. The reversal of 6421053823 is 3283501246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421053823 - 2⁵ = 6421053791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6421053523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210526911 + 3210526912.

It is an arithmetic number, because the mean of its divisors is an integer number (3210526912).

Almost surely, 2^6421053823 is an apocalyptic number.

6421053823 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421053823 is an equidigital number, since it uses as much as digits as its factorization.

6421053823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 6421053823 is about 80131.4783527672. The cubic root of 6421053823 is about 1858.6692048299.

The spelling of 6421053823 in words is "six billion, four hundred twenty-one million, fifty-three thousand, eight hundred twenty-three".