13989667217 has 6 divisors (see below), whose sum is σ = 14860996278. Its totient is φ = 13166745344.

The previous prime is 13989667169. The next prime is 13989667229. The reversal of 13989667217 is 71276698931.

It can be written as a sum of positive squares in 3 ways, for example, as 2068521361 + 11921145856 = 45481^2 + 109184^2 .

It is not a de Polignac number, because 13989667217 - 2¹⁴ = 13989650833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13989667247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24203288 + ... + 24203865.

It is an arithmetic number, because the mean of its divisors is an integer number (2476832713).

Almost surely, 2^13989667217 is an apocalyptic number.

13989667217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13989667217 is a deficient number, since it is larger than the sum of its proper divisors (871329061).

13989667217 is an equidigital number, since it uses as much as digits as its factorization.

13989667217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48407187 (or 48407170 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 59.

The spelling of 13989667217 in words is "thirteen billion, nine hundred eighty-nine million, six hundred sixty-seven thousand, two hundred seventeen".