13520149 has 2 divisors, whose sum is σ = 13520150. Its totient is φ = 13520148.

The previous prime is 13520147. The next prime is 13520167. The reversal of 13520149 is 94102531.

13520149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 3972049 = 3090^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520149 - 2¹ = 13520147 is a prime.

Together with 13520147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760074 + 6760075.

It is an arithmetic number, because the mean of its divisors is an integer number (6760075).

Almost surely, 2^13520149 is an apocalyptic number.

It is an amenable number.

13520149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520149 is an equidigital number, since it uses as much as digits as its factorization.

13520149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13520149 is about 3676.9755234431. The cubic root of 13520149 is about 238.2285601822.

The spelling of 13520149 in words is "thirteen million, five hundred twenty thousand, one hundred forty-nine".