13521933 has 6 divisors (see below), whose sum is σ = 19531694. Its totient is φ = 9014616.

The previous prime is 13521929. The next prime is 13521941. The reversal of 13521933 is 33912531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9847044 + 3674889 = 3138^2 + 1917^2 .

It is not a de Polignac number, because 13521933 - 2² = 13521929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13521897 and 13521906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 751210 + ... + 751227.

Almost surely, 2^13521933 is an apocalyptic number.

It is an amenable number.

13521933 is a deficient number, since it is larger than the sum of its proper divisors (6009761).

13521933 is a wasteful number, since it uses less digits than its factorization.

13521933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502443 (or 1502440 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 13521933 is about 3677.2181061232. The cubic root of 13521933 is about 238.2390379035.

The spelling of 13521933 in words is "thirteen million, five hundred twenty-one thousand, nine hundred thirty-three".