13799521 has 4 divisors (see below), whose sum is σ = 14005552. Its totient is φ = 13593492.

The previous prime is 13799519. The next prime is 13799531. The reversal of 13799521 is 12599731.

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 not a de Polignac number, because 13799521 - 2¹ = 13799519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13799501) 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, 102915 + ... + 103048.

It is an arithmetic number, because the mean of its divisors is an integer number (3501388).

Almost surely, 2^13799521 is an apocalyptic number.

It is an amenable number.

13799521 is a deficient number, since it is larger than the sum of its proper divisors (206031).

13799521 is an equidigital number, since it uses as much as digits as its factorization.

13799521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206030.

The product of its digits is 17010, while the sum is 37.

The square root of 13799521 is about 3714.7706524091. The cubic root of 13799521 is about 239.8582554222.

The spelling of 13799521 in words is "thirteen million, seven hundred ninety-nine thousand, five hundred twenty-one".