118271987 has 2 divisors, whose sum is σ = 118271988. Its totient is φ = 118271986.

The previous prime is 118271981. The next prime is 118272001. The reversal of 118271987 is 789172811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118271987 - 2⁴ = 118271971 is a prime.

It is not a weakly prime, because it can be changed into another prime (118271981) 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 as a sum of consecutive naturals, namely, 59135993 + 59135994.

It is an arithmetic number, because the mean of its divisors is an integer number (59135994).

Almost surely, 2^118271987 is an apocalyptic number.

118271987 is a deficient number, since it is larger than the sum of its proper divisors (1).

118271987 is an equidigital number, since it uses as much as digits as its factorization.

118271987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 44.

The square root of 118271987 is about 10875.2925018135. The cubic root of 118271987 is about 490.8633771884.

The spelling of 118271987 in words is "one hundred eighteen million, two hundred seventy-one thousand, nine hundred eighty-seven".