13863212639 has 4 divisors (see below), whose sum is σ = 13863853056. Its totient is φ = 13862572224.

The previous prime is 13863212609. The next prime is 13863212653. The reversal of 13863212639 is 93621236831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13863212639 - 2¹² = 13863208543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13863212639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13863212609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286559 + ... + 331424.

It is an arithmetic number, because the mean of its divisors is an integer number (3465963264).

Almost surely, 2^13863212639 is an apocalyptic number.

13863212639 is a deficient number, since it is larger than the sum of its proper divisors (640417).

13863212639 is an equidigital number, since it uses as much as digits as its factorization.

13863212639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640416.

The product of its digits is 279936, while the sum is 44.

The spelling of 13863212639 in words is "thirteen billion, eight hundred sixty-three million, two hundred twelve thousand, six hundred thirty-nine".