1361388543 has 12 divisors (see below), whose sum is σ = 1928242440. Its totient is φ = 854204032.

The previous prime is 1361388521. The next prime is 1361388547. The reversal of 1361388543 is 3458831631.

It is not a de Polignac number, because 1361388543 - 2¹⁰ = 1361387519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1361388495 and 1361388504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361388547) 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 11 ways as a sum of consecutive naturals, for example, 784248 + ... + 785981.

It is an arithmetic number, because the mean of its divisors is an integer number (160686870).

Almost surely, 2^1361388543 is an apocalyptic number.

1361388543 is a deficient number, since it is larger than the sum of its proper divisors (566853897).

1361388543 is a wasteful number, since it uses less digits than its factorization.

1361388543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570266 (or 1570249 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 1361388543 is about 36896.9991056183. Note that the first 3 decimals coincide. The cubic root of 1361388543 is about 1108.3085845542.

The spelling of 1361388543 in words is "one billion, three hundred sixty-one million, three hundred eighty-eight thousand, five hundred forty-three".