1863968489 has 2 divisors, whose sum is σ = 1863968490. Its totient is φ = 1863968488.

The previous prime is 1863968479. The next prime is 1863968503. The reversal of 1863968489 is 9848693681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1746571264 + 117397225 = 41792^2 + 10835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1863968489 - 2⁸ = 1863968233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1863968479) 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, 931984244 + 931984245.

It is an arithmetic number, because the mean of its divisors is an integer number (931984245).

Almost surely, 2^1863968489 is an apocalyptic number.

It is an amenable number.

1863968489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863968489 is an equidigital number, since it uses as much as digits as its factorization.

1863968489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 62.

The square root of 1863968489 is about 43173.7013585817. The cubic root of 1863968489 is about 1230.6829637385.

The spelling of 1863968489 in words is "one billion, eight hundred sixty-three million, nine hundred sixty-eight thousand, four hundred eighty-nine".