13893249639 has 4 divisors (see below), whose sum is σ = 18524332856. Its totient is φ = 9262166424.

The previous prime is 13893249637. The next prime is 13893249707. The reversal of 13893249639 is 93694239831.

It is a happy number.

13893249639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93694239831 = 3 ⋅31231413277.

It is not a de Polignac number, because 13893249639 - 2¹ = 13893249637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13893249631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315541604 + ... + 2315541609.

It is an arithmetic number, because the mean of its divisors is an integer number (4631083214).

Almost surely, 2^13893249639 is an apocalyptic number.

13893249639 is a deficient number, since it is larger than the sum of its proper divisors (4631083217).

13893249639 is an equidigital number, since it uses as much as digits as its factorization.

13893249639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631083216.

The product of its digits is 7558272, while the sum is 57.

The spelling of 13893249639 in words is "thirteen billion, eight hundred ninety-three million, two hundred forty-nine thousand, six hundred thirty-nine".