13563149 has 2 divisors, whose sum is σ = 13563150. Its totient is φ = 13563148.

The previous prime is 13563107. The next prime is 13563191. The reversal of 13563149 is 94136531.

It is a balanced prime because it is at equal distance from previous prime (13563107) and next prime (13563191).

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 94249 = 3670^2 + 307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13563149 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 (13563049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6781574 + 6781575.

It is an arithmetic number, because the mean of its divisors is an integer number (6781575).

Almost surely, 2^13563149 is an apocalyptic number.

It is an amenable number.

13563149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13563149 is an equidigital number, since it uses as much as digits as its factorization.

13563149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 13563149 is about 3682.8180785914. The cubic root of 13563149 is about 238.4808499876.

The spelling of 13563149 in words is "thirteen million, five hundred sixty-three thousand, one hundred forty-nine".