87119987 has 2 divisors, whose sum is σ = 87119988. Its totient is φ = 87119986.

The previous prime is 87119983. The next prime is 87120029. The reversal of 87119987 is 78991178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87119987 - 2² = 87119983 is a prime.

It is not a weakly prime, because it can be changed into another prime (87119983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43559993 + 43559994.

It is an arithmetic number, because the mean of its divisors is an integer number (43559994).

Almost surely, 2^87119987 is an apocalyptic number.

87119987 is a deficient number, since it is larger than the sum of its proper divisors (1).

87119987 is an equidigital number, since it uses as much as digits as its factorization.

87119987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 50.

The square root of 87119987 is about 9333.8088152694. The cubic root of 87119987 is about 443.3083728511.

The spelling of 87119987 in words is "eighty-seven million, one hundred nineteen thousand, nine hundred eighty-seven".