86887987 has 2 divisors, whose sum is σ = 86887988. Its totient is φ = 86887986.

The previous prime is 86887981. The next prime is 86887991. The reversal of 86887987 is 78978868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86887987 is a prime.

It is not a weakly prime, because it can be changed into another prime (86887981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43443993 + 43443994.

It is an arithmetic number, because the mean of its divisors is an integer number (43443994).

Almost surely, 2^86887987 is an apocalyptic number.

86887987 is a deficient number, since it is larger than the sum of its proper divisors (1).

86887987 is an equidigital number, since it uses as much as digits as its factorization.

86887987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 61.

The square root of 86887987 is about 9321.3725920596. The cubic root of 86887987 is about 442.9145138548.

The spelling of 86887987 in words is "eighty-six million, eight hundred eighty-seven thousand, nine hundred eighty-seven".