13933481 has 4 divisors (see below), whose sum is σ = 14273364. Its totient is φ = 13593600.

The previous prime is 13933471. The next prime is 13933483. The reversal of 13933481 is 18433931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6205081 + 7728400 = 2491^2 + 2780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13933481 is a prime.

It is a super-2 number, since 2×13933481² = 388283785554722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13933483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169880 + ... + 169961.

It is an arithmetic number, because the mean of its divisors is an integer number (3568341).

Almost surely, 2^13933481 is an apocalyptic number.

It is an amenable number.

13933481 is a deficient number, since it is larger than the sum of its proper divisors (339883).

13933481 is an equidigital number, since it uses as much as digits as its factorization.

13933481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339882.

The product of its digits is 7776, while the sum is 32.

The square root of 13933481 is about 3732.7578276658. The cubic root of 13933481 is about 240.6319053733.

The spelling of 13933481 in words is "thirteen million, nine hundred thirty-three thousand, four hundred eighty-one".