13613533 has 2 divisors, whose sum is σ = 13613534. Its totient is φ = 13613532.

The previous prime is 13613531. The next prime is 13613563. The reversal of 13613533 is 33531631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13527684 + 85849 = 3678^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 13613533 - 2¹ = 13613531 is a prime.

Together with 13613531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13613498 and 13613507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13613531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6806766 + 6806767.

It is an arithmetic number, because the mean of its divisors is an integer number (6806767).

Almost surely, 2^13613533 is an apocalyptic number.

It is an amenable number.

13613533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13613533 is an equidigital number, since it uses as much as digits as its factorization.

13613533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 25.

The square root of 13613533 is about 3689.6521516262. The cubic root of 13613533 is about 238.7757857076.

The spelling of 13613533 in words is "thirteen million, six hundred thirteen thousand, five hundred thirty-three".