1873491161 has 2 divisors, whose sum is σ = 1873491162. Its totient is φ = 1873491160.

The previous prime is 1873491157. The next prime is 1873491203. The reversal of 1873491161 is 1611943781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299169936 + 574321225 = 36044^2 + 23965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1873491161 - 2² = 1873491157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1873491101) 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, 936745580 + 936745581.

It is an arithmetic number, because the mean of its divisors is an integer number (936745581).

Almost surely, 2^1873491161 is an apocalyptic number.

It is an amenable number.

1873491161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873491161 is an equidigital number, since it uses as much as digits as its factorization.

1873491161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 1873491161 is about 43283.8441107072. The cubic root of 1873491161 is about 1232.7751824495.

The spelling of 1873491161 in words is "one billion, eight hundred seventy-three million, four hundred ninety-one thousand, one hundred sixty-one".