13913533 has 4 divisors (see below), whose sum is σ = 14393340. Its totient is φ = 13433728.

The previous prime is 13913527. The next prime is 13913569. The reversal of 13913533 is 33531931.

13913533 is nontrivially palindromic in base 11.

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 9474084 + 4439449 = 3078^2 + 2107^2 .

It is not a de Polignac number, because 13913533 - 2²¹ = 11816381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13913573) 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, 239860 + ... + 239917.

It is an arithmetic number, because the mean of its divisors is an integer number (3598335).

Almost surely, 2^13913533 is an apocalyptic number.

It is an amenable number.

13913533 is a deficient number, since it is larger than the sum of its proper divisors (479807).

13913533 is an equidigital number, since it uses as much as digits as its factorization.

13913533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479806.

The product of its digits is 3645, while the sum is 28.

The square root of 13913533 is about 3730.0848515818. The cubic root of 13913533 is about 240.5170162132.

The spelling of 13913533 in words is "thirteen million, nine hundred thirteen thousand, five hundred thirty-three".