13143847 has 2 divisors, whose sum is σ = 13143848. Its totient is φ = 13143846.

The previous prime is 13143827. The next prime is 13143881. The reversal of 13143847 is 74834131.

13143847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74834131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13143847 - 2⁷ = 13143719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13143817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6571923 + 6571924.

It is an arithmetic number, because the mean of its divisors is an integer number (6571924).

Almost surely, 2^13143847 is an apocalyptic number.

13143847 is a deficient number, since it is larger than the sum of its proper divisors (1).

13143847 is an equidigital number, since it uses as much as digits as its factorization.

13143847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 13143847 is about 3625.4443865546. Note that the first 3 decimals coincide. The cubic root of 13143847 is about 235.9975521627.

Adding to 13143847 its reverse (74834131), we get a palindrome (87977978).

It can be divided in two parts, 13143 and 847, that multiplied together give a triangular number (11132121 = T₄₇₁₈).

The spelling of 13143847 in words is "thirteen million, one hundred forty-three thousand, eight hundred forty-seven".