13523989 has 2 divisors, whose sum is σ = 13523990. Its totient is φ = 13523988.

The previous prime is 13523969. The next prime is 13523999. The reversal of 13523989 is 98932531.

13523989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8749764 + 4774225 = 2958^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 13523989 - 2¹¹ = 13521941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13523969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6761994 + 6761995.

It is an arithmetic number, because the mean of its divisors is an integer number (6761995).

Almost surely, 2^13523989 is an apocalyptic number.

It is an amenable number.

13523989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13523989 is an equidigital number, since it uses as much as digits as its factorization.

13523989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 13523989 is about 3677.4976546559. The cubic root of 13523989 is about 238.2511119819.

The spelling of 13523989 in words is "thirteen million, five hundred twenty-three thousand, nine hundred eighty-nine".