1868863111 has 4 divisors (see below), whose sum is σ = 1868979112. Its totient is φ = 1868747112.

The previous prime is 1868863049. The next prime is 1868863141. The reversal of 1868863111 is 1113688681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1868863111 - 2⁹ = 1868862599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868863141) 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 in 3 ways as a sum of consecutive naturals, for example, 29001 + ... + 67666.

It is an arithmetic number, because the mean of its divisors is an integer number (467244778).

Almost surely, 2^1868863111 is an apocalyptic number.

1868863111 is a deficient number, since it is larger than the sum of its proper divisors (116001).

1868863111 is an equidigital number, since it uses as much as digits as its factorization.

1868863111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116000.

The product of its digits is 55296, while the sum is 43.

The square root of 1868863111 is about 43230.3494202857. The cubic root of 1868863111 is about 1231.7592449855.

The spelling of 1868863111 in words is "one billion, eight hundred sixty-eight million, eight hundred sixty-three thousand, one hundred eleven".