13991122 has 8 divisors (see below), whose sum is σ = 21036672. Its totient is φ = 6978900.

The previous prime is 13991077. The next prime is 13991123. The reversal of 13991122 is 22119931.

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

It is not an unprimeable number, because it can be changed into a prime (13991123) 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, 7254 + ... + 8977.

It is an arithmetic number, because the mean of its divisors is an integer number (2629584).

Almost surely, 2^13991122 is an apocalyptic number.

13991122 is a deficient number, since it is larger than the sum of its proper divisors (7045550).

13991122 is a wasteful number, since it uses less digits than its factorization.

13991122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16664.

The product of its digits is 972, while the sum is 28.

The square root of 13991122 is about 3740.4708259790. The cubic root of 13991122 is about 240.9632698280.

The spelling of 13991122 in words is "thirteen million, nine hundred ninety-one thousand, one hundred twenty-two".