13731911 has 4 divisors (see below), whose sum is σ = 13792632. Its totient is φ = 13671192.

The previous prime is 13731901. The next prime is 13731917. The reversal of 13731911 is 11913731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13731911 - 2¹⁰ = 13730887 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 (13731917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30020 + ... + 30473.

It is an arithmetic number, because the mean of its divisors is an integer number (3448158).

Almost surely, 2^13731911 is an apocalyptic number.

13731911 is a deficient number, since it is larger than the sum of its proper divisors (60721).

13731911 is an equidigital number, since it uses as much as digits as its factorization.

13731911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60720.

The product of its digits is 567, while the sum is 26.

The square root of 13731911 is about 3705.6593205528. The cubic root of 13731911 is about 239.4658897876.

The spelling of 13731911 in words is "thirteen million, seven hundred thirty-one thousand, nine hundred eleven".