13813247 has 24 divisors (see below), whose sum is σ = 17414640. Its totient is φ = 10886400.

The previous prime is 13813237. The next prime is 13813297. The reversal of 13813247 is 74231831.

It is not a de Polignac number, because 13813247 - 2⁸ = 13812991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13813207) 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, 34247 + ... + 34647.

It is an arithmetic number, because the mean of its divisors is an integer number (725610).

Almost surely, 2^13813247 is an apocalyptic number.

13813247 is a deficient number, since it is larger than the sum of its proper divisors (3601393).

13813247 is a wasteful number, since it uses less digits than its factorization.

13813247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 464 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 13813247 is about 3716.6176827863. The cubic root of 13813247 is about 239.9377558491.

The spelling of 13813247 in words is "thirteen million, eight hundred thirteen thousand, two hundred forty-seven".