6399831227 has 2 divisors, whose sum is σ = 6399831228. Its totient is φ = 6399831226.

The previous prime is 6399831211. The next prime is 6399831247. The reversal of 6399831227 is 7221389936.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6399831227 - 2⁴ = 6399831211 is a prime.

It is not a weakly prime, because it can be changed into another prime (6399831247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199915613 + 3199915614.

It is an arithmetic number, because the mean of its divisors is an integer number (3199915614).

Almost surely, 2^6399831227 is an apocalyptic number.

6399831227 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399831227 is an equidigital number, since it uses as much as digits as its factorization.

6399831227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 6399831227 is about 79998.9451617957. The cubic root of 6399831227 is about 1856.6192129918.

The spelling of 6399831227 in words is "six billion, three hundred ninety-nine million, eight hundred thirty-one thousand, two hundred twenty-seven".