13143447 has 6 divisors (see below), whose sum is σ = 18984992. Its totient is φ = 8762292.

The previous prime is 13143443. The next prime is 13143461. The reversal of 13143447 is 74434131.

13143447 is a `hidden beast` number, since 1 + 314 + 344 + 7 = 666.

13143447 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13143447 - 2² = 13143443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13143447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730183 + ... + 730200.

Almost surely, 2^13143447 is an apocalyptic number.

13143447 is a deficient number, since it is larger than the sum of its proper divisors (5841545).

13143447 is a wasteful number, since it uses less digits than its factorization.

13143447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460389 (or 1460386 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 13143447 is about 3625.3892204838. The cubic root of 13143447 is about 235.9951581406.

Adding to 13143447 its reverse (74434131), we get a palindrome (87577578).

It can be divided in two parts, 1314 and 3447, that added together give a square (4761 = 69²).

The spelling of 13143447 in words is "thirteen million, one hundred forty-three thousand, four hundred forty-seven".