1868118887 has 2 divisors, whose sum is σ = 1868118888. Its totient is φ = 1868118886.

The previous prime is 1868118881. The next prime is 1868118929. The reversal of 1868118887 is 7888118681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1868118887 - 2⁴ = 1868118871 is a prime.

It is a super-3 number, since 3×1868118887³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868118881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934059443 + 934059444.

It is an arithmetic number, because the mean of its divisors is an integer number (934059444).

Almost surely, 2^1868118887 is an apocalyptic number.

1868118887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868118887 is an equidigital number, since it uses as much as digits as its factorization.

1868118887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1376256, while the sum is 56.

The square root of 1868118887 is about 43221.7409066317. The cubic root of 1868118887 is about 1231.5957183833.

The spelling of 1868118887 in words is "one billion, eight hundred sixty-eight million, one hundred eighteen thousand, eight hundred eighty-seven".