8513987 has 2 divisors, whose sum is σ = 8513988. Its totient is φ = 8513986.

The previous prime is 8513977. The next prime is 8513993. The reversal of 8513987 is 7893158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8513987 - 2⁴ = 8513971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8513927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256993 + 4256994.

It is an arithmetic number, because the mean of its divisors is an integer number (4256994).

Almost surely, 2^8513987 is an apocalyptic number.

8513987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513987 is an equidigital number, since it uses as much as digits as its factorization.

8513987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 8513987 is about 2917.8737121404. The cubic root of 8513987 is about 204.1946351430.

The spelling of 8513987 in words is "eight million, five hundred thirteen thousand, nine hundred eighty-seven".