13400381443 has 2 divisors, whose sum is σ = 13400381444. Its totient is φ = 13400381442.

The previous prime is 13400381429. The next prime is 13400381447. The reversal of 13400381443 is 34418300431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13400381443 is a prime.

It is not a weakly prime, because it can be changed into another prime (13400381447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700190721 + 6700190722.

It is an arithmetic number, because the mean of its divisors is an integer number (6700190722).

Almost surely, 2^13400381443 is an apocalyptic number.

13400381443 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400381443 is an equidigital number, since it uses as much as digits as its factorization.

13400381443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 13400381443 its reverse (34418300431), we get a palindrome (47818681874).

The spelling of 13400381443 in words is "thirteen billion, four hundred million, three hundred eighty-one thousand, four hundred forty-three".