1868692643 has 2 divisors, whose sum is σ = 1868692644. Its totient is φ = 1868692642.

The previous prime is 1868692613. The next prime is 1868692703. The reversal of 1868692643 is 3462968681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1868692643 - 2¹⁰ = 1868691619 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1868692613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934346321 + 934346322.

It is an arithmetic number, because the mean of its divisors is an integer number (934346322).

Almost surely, 2^1868692643 is an apocalyptic number.

1868692643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868692643 is an equidigital number, since it uses as much as digits as its factorization.

1868692643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 53.

The square root of 1868692643 is about 43228.3777511949. The cubic root of 1868692643 is about 1231.7217922835.

The spelling of 1868692643 in words is "one billion, eight hundred sixty-eight million, six hundred ninety-two thousand, six hundred forty-three".