1881064901 has 2 divisors, whose sum is σ = 1881064902. Its totient is φ = 1881064900.

The previous prime is 1881064891. The next prime is 1881064907. The reversal of 1881064901 is 1094601881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242492001 + 638572900 = 35249^2 + 25270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881064901 - 2²⁶ = 1813956037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1881064907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940532450 + 940532451.

It is an arithmetic number, because the mean of its divisors is an integer number (940532451).

Almost surely, 2^1881064901 is an apocalyptic number.

It is an amenable number.

1881064901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881064901 is an equidigital number, since it uses as much as digits as its factorization.

1881064901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 1881064901 is about 43371.2450939560. The cubic root of 1881064901 is about 1234.4341468478.

The spelling of 1881064901 in words is "one billion, eight hundred eighty-one million, sixty-four thousand, nine hundred one".