1836811489 has 2 divisors, whose sum is σ = 1836811490. Its totient is φ = 1836811488.

The previous prime is 1836811477. The next prime is 1836811573. The reversal of 1836811489 is 9841186381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303571025 + 533240464 = 36105^2 + 23092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1836811489 is a prime.

It is a super-2 number, since 2×1836811489² = 6747752892244794242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1836811409) 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, 918405744 + 918405745.

It is an arithmetic number, because the mean of its divisors is an integer number (918405745).

Almost surely, 2^1836811489 is an apocalyptic number.

It is an amenable number.

1836811489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1836811489 is an equidigital number, since it uses as much as digits as its factorization.

1836811489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 49.

The square root of 1836811489 is about 42858.0387908733. The cubic root of 1836811489 is about 1224.6769080453.

The spelling of 1836811489 in words is "one billion, eight hundred thirty-six million, eight hundred eleven thousand, four hundred eighty-nine".