1865141489 has 2 divisors, whose sum is σ = 1865141490. Its totient is φ = 1865141488.

The previous prime is 1865141483. The next prime is 1865141513. The reversal of 1865141489 is 9841415681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1813056400 + 52085089 = 42580^2 + 7217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1865141489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1865141483) 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, 932570744 + 932570745.

It is an arithmetic number, because the mean of its divisors is an integer number (932570745).

Almost surely, 2^1865141489 is an apocalyptic number.

It is an amenable number.

1865141489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865141489 is an equidigital number, since it uses as much as digits as its factorization.

1865141489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The square root of 1865141489 is about 43187.2838807907. The cubic root of 1865141489 is about 1230.9410668864.

The spelling of 1865141489 in words is "one billion, eight hundred sixty-five million, one hundred forty-one thousand, four hundred eighty-nine".