13991601 has 32 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 8160768.

The previous prime is 13991597. The next prime is 13991639. The reversal of 13991601 is 10619931.

It is not a de Polignac number, because 13991601 - 2² = 13991597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13991651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100590 + ... + 100728.

It is an arithmetic number, because the mean of its divisors is an integer number (661500).

Almost surely, 2^13991601 is an apocalyptic number.

It is an amenable number.

13991601 is a deficient number, since it is larger than the sum of its proper divisors (7176399).

13991601 is a wasteful number, since it uses less digits than its factorization.

13991601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 13991601 is about 3740.5348548035. The cubic root of 13991601 is about 240.9660196692.

The spelling of 13991601 in words is "thirteen million, nine hundred ninety-one thousand, six hundred one".