13521889 has 2 divisors, whose sum is σ = 13521890. Its totient is φ = 13521888.

The previous prime is 13521881. The next prime is 13521929. The reversal of 13521889 is 98812531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7246864 + 6275025 = 2692^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 13521889 - 2³ = 13521881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13521881) 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, 6760944 + 6760945.

It is an arithmetic number, because the mean of its divisors is an integer number (6760945).

Almost surely, 2^13521889 is an apocalyptic number.

It is an amenable number.

13521889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521889 is an equidigital number, since it uses as much as digits as its factorization.

13521889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 13521889 is about 3677.2121233347. The cubic root of 13521889 is about 238.2387794954.

The spelling of 13521889 in words is "thirteen million, five hundred twenty-one thousand, eight hundred eighty-nine".