6371320421 has 2 divisors, whose sum is σ = 6371320422. Its totient is φ = 6371320420.

The previous prime is 6371320399. The next prime is 6371320447. The reversal of 6371320421 is 1240231736.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5000469796 + 1370850625 = 70714^2 + 37025^2 .

It is a cyclic number.

It is not a de Polignac number, because 6371320421 - 2⁶ = 6371320357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6371320721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3185660210 + 3185660211.

It is an arithmetic number, because the mean of its divisors is an integer number (3185660211).

Almost surely, 2^6371320421 is an apocalyptic number.

It is an amenable number.

6371320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6371320421 is an equidigital number, since it uses as much as digits as its factorization.

6371320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 6371320421 is about 79820.5513699323. The cubic root of 6371320421 is about 1853.8580719147.

The spelling of 6371320421 in words is "six billion, three hundred seventy-one million, three hundred twenty thousand, four hundred twenty-one".