13992831721 has 8 divisors (see below), whose sum is σ = 15265836000. Its totient is φ = 12719982240.

The previous prime is 13992831719. The next prime is 13992831757. The reversal of 13992831721 is 12713829931.

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 13992831721 - 2¹ = 13992831719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13992831761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233730 + ... + 287428.

It is an arithmetic number, because the mean of its divisors is an integer number (1908229500).

Almost surely, 2^13992831721 is an apocalyptic number.

13992831721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13992831721 is a deficient number, since it is larger than the sum of its proper divisors (1273004279).

13992831721 is a wasteful number, since it uses less digits than its factorization.

13992831721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77399.

The product of its digits is 163296, while the sum is 46.

The spelling of 13992831721 in words is "thirteen billion, nine hundred ninety-two million, eight hundred thirty-one thousand, seven hundred twenty-one".