6719387399 has 2 divisors, whose sum is σ = 6719387400. Its totient is φ = 6719387398.

The previous prime is 6719387393. The next prime is 6719387429. The reversal of 6719387399 is 9937839176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6719387399 - 2¹² = 6719383303 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6719387393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359693699 + 3359693700.

It is an arithmetic number, because the mean of its divisors is an integer number (3359693700).

Almost surely, 2^6719387399 is an apocalyptic number.

6719387399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6719387399 is an equidigital number, since it uses as much as digits as its factorization.

6719387399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15431472, while the sum is 62.

The square root of 6719387399 is about 81971.8695590140. The cubic root of 6719387399 is about 1887.0202478434.

The spelling of 6719387399 in words is "six billion, seven hundred nineteen million, three hundred eighty-seven thousand, three hundred ninety-nine".