1942986791 has 2 divisors, whose sum is σ = 1942986792. Its totient is φ = 1942986790.

The previous prime is 1942986719. The next prime is 1942986827. The reversal of 1942986791 is 1976892491.

Together with previous prime (1942986719) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1942986791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1942982791) 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 as a sum of consecutive naturals, namely, 971493395 + 971493396.

It is an arithmetic number, because the mean of its divisors is an integer number (971493396).

Almost surely, 2^1942986791 is an apocalyptic number.

1942986791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942986791 is an equidigital number, since it uses as much as digits as its factorization.

1942986791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 56.

The square root of 1942986791 is about 44079.3238491699. The cubic root of 1942986791 is about 1247.8334290258.

The spelling of 1942986791 in words is "one billion, nine hundred forty-two million, nine hundred eighty-six thousand, seven hundred ninety-one".