13558949 has 2 divisors, whose sum is σ = 13558950. Its totient is φ = 13558948.

The previous prime is 13558939. The next prime is 13558981. The reversal of 13558949 is 94985531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 4060225 = 3082^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 13558949 - 2⁸ = 13558693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13558939) 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, 6779474 + 6779475.

It is an arithmetic number, because the mean of its divisors is an integer number (6779475).

Almost surely, 2^13558949 is an apocalyptic number.

It is an amenable number.

13558949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13558949 is an equidigital number, since it uses as much as digits as its factorization.

13558949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 44.

The square root of 13558949 is about 3682.2478189280. The cubic root of 13558949 is about 238.4562312461.

The spelling of 13558949 in words is "thirteen million, five hundred fifty-eight thousand, nine hundred forty-nine".