13899384643 has 2 divisors, whose sum is σ = 13899384644. Its totient is φ = 13899384642.

The previous prime is 13899384613. The next prime is 13899384677. The reversal of 13899384643 is 34648399831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13899384643 - 2²¹ = 13897287491 is a prime.

It is not a weakly prime, because it can be changed into another prime (13899384613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6949692321 + 6949692322.

It is an arithmetic number, because the mean of its divisors is an integer number (6949692322).

Almost surely, 2^13899384643 is an apocalyptic number.

13899384643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13899384643 is an equidigital number, since it uses as much as digits as its factorization.

13899384643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 58.

The spelling of 13899384643 in words is "thirteen billion, eight hundred ninety-nine million, three hundred eighty-four thousand, six hundred forty-three".