13991574 has 8 divisors (see below), whose sum is σ = 27983160. Its totient is φ = 4663856.

The previous prime is 13991573. The next prime is 13991591. The reversal of 13991574 is 47519931.

It is a happy number.

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

13991574 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991573) 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, 1165959 + ... + 1165970.

It is an arithmetic number, because the mean of its divisors is an integer number (3497895).

Almost surely, 2^13991574 is an apocalyptic number.

13991574 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13991574 is a wasteful number, since it uses less digits than its factorization.

13991574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331934.

The product of its digits is 34020, while the sum is 39.

The square root of 13991574 is about 3740.5312456922. The cubic root of 13991574 is about 240.9658646694.

The spelling of 13991574 in words is "thirteen million, nine hundred ninety-one thousand, five hundred seventy-four".