13972289 has 4 divisors (see below), whose sum is σ = 14423040. Its totient is φ = 13521540.

The previous prime is 13972279. The next prime is 13972307. The reversal of 13972289 is 98227931.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13972289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13972279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225329 + ... + 225390.

It is an arithmetic number, because the mean of its divisors is an integer number (3605760).

Almost surely, 2^13972289 is an apocalyptic number.

It is an amenable number.

13972289 is a deficient number, since it is larger than the sum of its proper divisors (450751).

13972289 is an equidigital number, since it uses as much as digits as its factorization.

13972289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450750.

The product of its digits is 54432, while the sum is 41.

The square root of 13972289 is about 3737.9525144121. The cubic root of 13972289 is about 240.8551036408.

The spelling of 13972289 in words is "thirteen million, nine hundred seventy-two thousand, two hundred eighty-nine".