1868503849 has 2 divisors, whose sum is σ = 1868503850. Its totient is φ = 1868503848.

The previous prime is 1868503841. The next prime is 1868503873. The reversal of 1868503849 is 9483058681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635636249 + 232867600 = 40443^2 + 15260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1868503849 - 2³ = 1868503841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868503796 and 1868503805.

It is not a weakly prime, because it can be changed into another prime (1868503841) 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, 934251924 + 934251925.

It is an arithmetic number, because the mean of its divisors is an integer number (934251925).

Almost surely, 2^1868503849 is an apocalyptic number.

It is an amenable number.

1868503849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868503849 is an equidigital number, since it uses as much as digits as its factorization.

1868503849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 1868503849 is about 43226.1940147406. The cubic root of 1868503849 is about 1231.6803106062.

The spelling of 1868503849 in words is "one billion, eight hundred sixty-eight million, five hundred three thousand, eight hundred forty-nine".