1881386873 has 2 divisors, whose sum is σ = 1881386874. Its totient is φ = 1881386872.

The previous prime is 1881386849. The next prime is 1881386929. The reversal of 1881386873 is 3786831881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1881217129 + 169744 = 43373^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881386873 - 2¹⁴ = 1881370489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1887386873) 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, 940693436 + 940693437.

It is an arithmetic number, because the mean of its divisors is an integer number (940693437).

Almost surely, 2^1881386873 is an apocalyptic number.

It is an amenable number.

1881386873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881386873 is an equidigital number, since it uses as much as digits as its factorization.

1881386873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 53.

The square root of 1881386873 is about 43374.9567492580. The cubic root of 1881386873 is about 1234.5045733664.

The spelling of 1881386873 in words is "one billion, eight hundred eighty-one million, three hundred eighty-six thousand, eight hundred seventy-three".