13581149 has 2 divisors, whose sum is σ = 13581150. Its totient is φ = 13581148.

The previous prime is 13581137. The next prime is 13581173. The reversal of 13581149 is 94118531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 24025 = 3682^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 13581149 - 2¹⁶ = 13515613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13581199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790574 + 6790575.

It is an arithmetic number, because the mean of its divisors is an integer number (6790575).

Almost surely, 2^13581149 is an apocalyptic number.

It is an amenable number.

13581149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581149 is an equidigital number, since it uses as much as digits as its factorization.

13581149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 13581149 is about 3685.2610490982. The cubic root of 13581149 is about 238.5863013528.

The spelling of 13581149 in words is "thirteen million, five hundred eighty-one thousand, one hundred forty-nine".