13143881 has 2 divisors, whose sum is σ = 13143882. Its totient is φ = 13143880.

The previous prime is 13143847. The next prime is 13143901. The reversal of 13143881 is 18834131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 4494400 = 2941^2 + 2120^2 .

It is an emirp because it is prime and its reverse (18834131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13143881 - 2⁶ = 13143817 is a prime.

It is a super-2 number, since 2×13143881² = 345523215484322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13143811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6571940 + 6571941.

It is an arithmetic number, because the mean of its divisors is an integer number (6571941).

Almost surely, 2^13143881 is an apocalyptic number.

It is an amenable number.

13143881 is a deficient number, since it is larger than the sum of its proper divisors (1).

13143881 is an equidigital number, since it uses as much as digits as its factorization.

13143881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 13143881 is about 3625.4490756319. The cubic root of 13143881 is about 235.9977556523.

The spelling of 13143881 in words is "thirteen million, one hundred forty-three thousand, eight hundred eighty-one".