13911247 has 12 divisors (see below), whose sum is σ = 16277376. Its totient is φ = 11854080.

The previous prime is 13911229. The next prime is 13911257. The reversal of 13911247 is 74211931.

13911247 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13911247 - 2⁷ = 13911119 is a prime.

It is a Duffinian number.

13911247 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13911257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8722 + ... + 10192.

It is an arithmetic number, because the mean of its divisors is an integer number (1356448).

Almost surely, 2^13911247 is an apocalyptic number.

13911247 is a deficient number, since it is larger than the sum of its proper divisors (2366129).

13911247 is a wasteful number, since it uses less digits than its factorization.

13911247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1671 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 13911247 is about 3729.7784116486. The cubic root of 13911247 is about 240.5038431389.

The spelling of 13911247 in words is "thirteen million, nine hundred eleven thousand, two hundred forty-seven".