13381549 has 2 divisors, whose sum is σ = 13381550. Its totient is φ = 13381548.

The previous prime is 13381523. The next prime is 13381597. The reversal of 13381549 is 94518331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13322500 + 59049 = 3650^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 13381549 - 2⁷ = 13381421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13381649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6690774 + 6690775.

It is an arithmetic number, because the mean of its divisors is an integer number (6690775).

Almost surely, 2^13381549 is an apocalyptic number.

It is an amenable number.

13381549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13381549 is an equidigital number, since it uses as much as digits as its factorization.

13381549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 13381549 is about 3658.0799608538. The cubic root of 13381549 is about 237.4117064227.

The spelling of 13381549 in words is "thirteen million, three hundred eighty-one thousand, five hundred forty-nine".