13809533 has 2 divisors, whose sum is σ = 13809534. Its totient is φ = 13809532.

The previous prime is 13809517. The next prime is 13809553. The reversal of 13809533 is 33590831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 465124 = 3653^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 13809533 - 2⁴ = 13809517 is a prime.

It is a Chen prime.

It is equal to p₈₉₈₅₁₁ and since 13809533 and 898511 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13809533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13809553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6904766 + 6904767.

It is an arithmetic number, because the mean of its divisors is an integer number (6904767).

Almost surely, 2^13809533 is an apocalyptic number.

It is an amenable number.

13809533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13809533 is an equidigital number, since it uses as much as digits as its factorization.

13809533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 13809533 is about 3716.1180013557. The cubic root of 13809533 is about 239.9162497131.

The spelling of 13809533 in words is "thirteen million, eight hundred nine thousand, five hundred thirty-three".