13181949 has 24 divisors (see below), whose sum is σ = 21220992. Its totient is φ = 7816320.

The previous prime is 13181941. The next prime is 13181963. The reversal of 13181949 is 94918131.

It is not a de Polignac number, because 13181949 - 2³ = 13181941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13181941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3237 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (884208).

Almost surely, 2^13181949 is an apocalyptic number.

It is an amenable number.

13181949 is a deficient number, since it is larger than the sum of its proper divisors (8039043).

13181949 is a wasteful number, since it uses less digits than its factorization.

13181949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897 (or 2894 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 13181949 is about 3630.6953879388. The cubic root of 13181949 is about 236.2253724223.

The spelling of 13181949 in words is "thirteen million, one hundred eighty-one thousand, nine hundred forty-nine".