13899043643 has 4 divisors (see below), whose sum is σ = 14378321040. Its totient is φ = 13419766248.

The previous prime is 13899043607. The next prime is 13899043679. The reversal of 13899043643 is 34634099831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34634099831 = 128861 ⋅268771.

It is an interprime number because it is at equal distance from previous prime (13899043607) and next prime (13899043679).

It is a cyclic number.

It is not a de Polignac number, because 13899043643 - 2¹² = 13899039547 is a prime.

It is a super-2 number, since 2×13899043643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13899043591 and 13899043600.

It is not an unprimeable number, because it can be changed into a prime (13899043603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239638655 + ... + 239638712.

It is an arithmetic number, because the mean of its divisors is an integer number (3594580260).

Almost surely, 2^13899043643 is an apocalyptic number.

13899043643 is a deficient number, since it is larger than the sum of its proper divisors (479277397).

13899043643 is an equidigital number, since it uses as much as digits as its factorization.

13899043643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479277396.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 13899043643 in words is "thirteen billion, eight hundred ninety-nine million, forty-three thousand, six hundred forty-three".