13999039681 has 8 divisors (see below), whose sum is σ = 15530522400. Its totient is φ = 12510697440.

The previous prime is 13999039679. The next prime is 13999039699. The reversal of 13999039681 is 18693099931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13999039681 - 2¹ = 13999039679 is a prime.

It is a super-4 number, since 4×13999039681⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13999039661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10784436 + ... + 10785733.

It is an arithmetic number, because the mean of its divisors is an integer number (1941315300).

Almost surely, 2^13999039681 is an apocalyptic number.

13999039681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13999039681 is a deficient number, since it is larger than the sum of its proper divisors (1531482719).

13999039681 is a wasteful number, since it uses less digits than its factorization.

13999039681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21570239.

The product of its (nonzero) digits is 2834352, while the sum is 58.

The spelling of 13999039681 in words is "thirteen billion, nine hundred ninety-nine million, thirty-nine thousand, six hundred eighty-one".