13991613 has 8 divisors (see below), whose sum is σ = 19466688. Its totient is φ = 8922144.

The previous prime is 13991597. The next prime is 13991639. The reversal of 13991613 is 31619931.

It is a happy number.

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

It is not a de Polignac number, because 13991613 - 2⁴ = 13991597 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101320 + ... + 101457.

It is an arithmetic number, because the mean of its divisors is an integer number (2433336).

Almost surely, 2^13991613 is an apocalyptic number.

It is an amenable number.

13991613 is a deficient number, since it is larger than the sum of its proper divisors (5475075).

13991613 is a wasteful number, since it uses less digits than its factorization.

13991613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202803.

The product of its digits is 4374, while the sum is 33.

The square root of 13991613 is about 3740.5364588519. The cubic root of 13991613 is about 240.9660885579.

The spelling of 13991613 in words is "thirteen million, nine hundred ninety-one thousand, six hundred thirteen".