13538533 has 2 divisors, whose sum is σ = 13538534. Its totient is φ = 13538532.

The previous prime is 13538531. The next prime is 13538543. The reversal of 13538533 is 33583531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8076964 + 5461569 = 2842^2 + 2337^2 .

It is a cyclic number.

It is not a de Polignac number, because 13538533 - 2¹ = 13538531 is a prime.

Together with 13538531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13538495 and 13538504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13538531) 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 as a sum of consecutive naturals, namely, 6769266 + 6769267.

It is an arithmetic number, because the mean of its divisors is an integer number (6769267).

Almost surely, 2^13538533 is an apocalyptic number.

It is an amenable number.

13538533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538533 is an equidigital number, since it uses as much as digits as its factorization.

13538533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 13538533 is about 3679.4745548787. The cubic root of 13538533 is about 238.3364882407.

The spelling of 13538533 in words is "thirteen million, five hundred thirty-eight thousand, five hundred thirty-three".