1361982443 has 4 divisors (see below), whose sum is σ = 1362800160. Its totient is φ = 1361164728.

The previous prime is 1361982439. The next prime is 1361982449. The reversal of 1361982443 is 3442891631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361982443 - 2² = 1361982439 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 1361982443.

It is not an unprimeable number, because it can be changed into a prime (1361982449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406355 + ... + 409692.

It is an arithmetic number, because the mean of its divisors is an integer number (340700040).

Almost surely, 2^1361982443 is an apocalyptic number.

1361982443 is a deficient number, since it is larger than the sum of its proper divisors (817717).

1361982443 is an equidigital number, since it uses as much as digits as its factorization.

1361982443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817716.

The product of its digits is 124416, while the sum is 41.

The square root of 1361982443 is about 36905.0463080593. The cubic root of 1361982443 is about 1108.4697261032.

The spelling of 1361982443 in words is "one billion, three hundred sixty-one million, nine hundred eighty-two thousand, four hundred forty-three".