1194985543 has 2 divisors, whose sum is σ = 1194985544. Its totient is φ = 1194985542.

The previous prime is 1194985529. The next prime is 1194985567. The reversal of 1194985543 is 3455894911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1194985543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1194985343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597492771 + 597492772.

It is an arithmetic number, because the mean of its divisors is an integer number (597492772).

Almost surely, 2^1194985543 is an apocalyptic number.

1194985543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194985543 is an equidigital number, since it uses as much as digits as its factorization.

1194985543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 49.

The square root of 1194985543 is about 34568.5629293438. The cubic root of 1194985543 is about 1061.1763204910.

The spelling of 1194985543 in words is "one billion, one hundred ninety-four million, nine hundred eighty-five thousand, five hundred forty-three".