87868987 has 2 divisors, whose sum is σ = 87868988. Its totient is φ = 87868986.

The previous prime is 87868967. The next prime is 87868999. The reversal of 87868987 is 78986878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87868987 is a prime.

It is not a weakly prime, because it can be changed into another prime (87868967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43934493 + 43934494.

It is an arithmetic number, because the mean of its divisors is an integer number (43934494).

Almost surely, 2^87868987 is an apocalyptic number.

87868987 is a deficient number, since it is larger than the sum of its proper divisors (1).

87868987 is an equidigital number, since it uses as much as digits as its factorization.

87868987 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 87868987 is about 9373.8459022965. The cubic root of 87868987 is about 444.5751734024.

The spelling of 87868987 in words is "eighty-seven million, eight hundred sixty-eight thousand, nine hundred eighty-seven".