13731149 has 4 divisors (see below), whose sum is σ = 13744764. Its totient is φ = 13717536.

The previous prime is 13731143. The next prime is 13731163. The reversal of 13731149 is 94113731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94113731 = 127 ⋅741053.

It can be written as a sum of positive squares in 2 ways, for example, as 8970025 + 4761124 = 2995^2 + 2182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13731149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13731143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5162 + ... + 7355.

It is an arithmetic number, because the mean of its divisors is an integer number (3436191).

Almost surely, 2^13731149 is an apocalyptic number.

It is an amenable number.

13731149 is a deficient number, since it is larger than the sum of its proper divisors (13615).

13731149 is a wasteful number, since it uses less digits than its factorization.

13731149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614.

The product of its digits is 2268, while the sum is 29.

The square root of 13731149 is about 3705.5565034148. The cubic root of 13731149 is about 239.4614602904.

The spelling of 13731149 in words is "thirteen million, seven hundred thirty-one thousand, one hundred forty-nine".