1840393187839 has 2 divisors, whose sum is σ = 1840393187840. Its totient is φ = 1840393187838.

The previous prime is 1840393187819. The next prime is 1840393187849. The reversal of 1840393187839 is 9387813930481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1840393187839 - 2¹⁵ = 1840393155071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1840393187819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920196593919 + 920196593920.

It is an arithmetic number, because the mean of its divisors is an integer number (920196593920).

Almost surely, 2^{1840393187839} is an apocalyptic number.

1840393187839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840393187839 is an equidigital number, since it uses as much as digits as its factorization.

1840393187839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 1840393187839 in words is "one trillion, eight hundred forty billion, three hundred ninety-three million, one hundred eighty-seven thousand, eight hundred thirty-nine".