13540889 has 2 divisors, whose sum is σ = 13540890. Its totient is φ = 13540888.

The previous prime is 13540873. The next prime is 13540897. The reversal of 13540889 is 98804531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 3268864 = 3205^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 13540889 - 2⁴ = 13540873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13540489) 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, 6770444 + 6770445.

It is an arithmetic number, because the mean of its divisors is an integer number (6770445).

Almost surely, 2^13540889 is an apocalyptic number.

It is an amenable number.

13540889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13540889 is an equidigital number, since it uses as much as digits as its factorization.

13540889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 13540889 is about 3679.7946953601. The cubic root of 13540889 is about 238.3503126878.

The spelling of 13540889 in words is "thirteen million, five hundred forty thousand, eight hundred eighty-nine".