13089521 has 2 divisors, whose sum is σ = 13089522. Its totient is φ = 13089520.

The previous prime is 13089493. The next prime is 13089529. The reversal of 13089521 is 12598031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9991921 + 3097600 = 3161^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13089521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13089529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6544760 + 6544761.

It is an arithmetic number, because the mean of its divisors is an integer number (6544761).

Almost surely, 2^13089521 is an apocalyptic number.

It is an amenable number.

13089521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13089521 is an equidigital number, since it uses as much as digits as its factorization.

13089521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 13089521 is about 3617.9443058179. The cubic root of 13089521 is about 235.6719623692.

The spelling of 13089521 in words is "thirteen million, eighty-nine thousand, five hundred twenty-one".