13909149 has 6 divisors (see below), whose sum is σ = 20091006. Its totient is φ = 9272760.

The previous prime is 13909141. The next prime is 13909153. The reversal of 13909149 is 94190931.

It can be written as a sum of positive squares in only one way, i.e., 12425625 + 1483524 = 3525^2 + 1218^2 .

It is not a de Polignac number, because 13909149 - 2³ = 13909141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909141) 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 in 5 ways as a sum of consecutive naturals, for example, 772722 + ... + 772739.

It is an arithmetic number, because the mean of its divisors is an integer number (3348501).

Almost surely, 2^13909149 is an apocalyptic number.

It is an amenable number.

13909149 is a deficient number, since it is larger than the sum of its proper divisors (6181857).

13909149 is a wasteful number, since it uses less digits than its factorization.

13909149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545467 (or 1545464 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 13909149 is about 3729.4971510916. The cubic root of 13909149 is about 240.4917521444.

The spelling of 13909149 in words is "thirteen million, nine hundred nine thousand, one hundred forty-nine".