1881001841 has 2 divisors, whose sum is σ = 1881001842. Its totient is φ = 1881001840.

The previous prime is 1881001831. The next prime is 1881001861. The reversal of 1881001841 is 1481001881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215568225 + 665433616 = 34865^2 + 25796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1881001841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1881001798 and 1881001807.

It is not a weakly prime, because it can be changed into another prime (1881001831) 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, 940500920 + 940500921.

It is an arithmetic number, because the mean of its divisors is an integer number (940500921).

Almost surely, 2^1881001841 is an apocalyptic number.

It is an amenable number.

1881001841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881001841 is an equidigital number, since it uses as much as digits as its factorization.

1881001841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 32.

The square root of 1881001841 is about 43370.5181085032. The cubic root of 1881001841 is about 1234.4203524829.

The spelling of 1881001841 in words is "one billion, eight hundred eighty-one million, one thousand, eight hundred forty-one".