13972117 has 4 divisors (see below), whose sum is σ = 13980160. Its totient is φ = 13964076.

The previous prime is 13972099. The next prime is 13972151. The reversal of 13972117 is 71127931.

13972117 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71127931 = 7 ⋅10161133.

It is a cyclic number.

It is not a de Polignac number, because 13972117 - 2¹¹ = 13970069 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 (13972187) 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, 213 + ... + 5290.

It is an arithmetic number, because the mean of its divisors is an integer number (3495040).

Almost surely, 2^13972117 is an apocalyptic number.

It is an amenable number.

13972117 is a deficient number, since it is larger than the sum of its proper divisors (8043).

13972117 is an equidigital number, since it uses as much as digits as its factorization.

13972117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8042.

The product of its digits is 2646, while the sum is 31.

The square root of 13972117 is about 3737.9295070935. The cubic root of 13972117 is about 240.8541153216.

The spelling of 13972117 in words is "thirteen million, nine hundred seventy-two thousand, one hundred seventeen".