6505789399 has 2 divisors, whose sum is σ = 6505789400. Its totient is φ = 6505789398.

The previous prime is 6505789357. The next prime is 6505789417. The reversal of 6505789399 is 9939875056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6505789399 - 2¹⁹ = 6505265111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6505789319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252894699 + 3252894700.

It is an arithmetic number, because the mean of its divisors is an integer number (3252894700).

Almost surely, 2^6505789399 is an apocalyptic number.

6505789399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6505789399 is an equidigital number, since it uses as much as digits as its factorization.

6505789399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18370800, while the sum is 61.

The square root of 6505789399 is about 80658.4738201759. The cubic root of 6505789399 is about 1866.8094908186.

The spelling of 6505789399 in words is "six billion, five hundred five million, seven hundred eighty-nine thousand, three hundred ninety-nine".