800987987 has 2 divisors, whose sum is σ = 800987988. Its totient is φ = 800987986.

The previous prime is 800987981. The next prime is 800987989. The reversal of 800987987 is 789789008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800987987 - 2²⁰ = 799939411 is a prime.

Together with 800987989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (800987981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400493993 + 400493994.

It is an arithmetic number, because the mean of its divisors is an integer number (400493994).

Almost surely, 2^800987987 is an apocalyptic number.

800987987 is a deficient number, since it is larger than the sum of its proper divisors (1).

800987987 is an equidigital number, since it uses as much as digits as its factorization.

800987987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 800987987 is about 28301.7311661319. The cubic root of 800987987 is about 928.6997619653.

The spelling of 800987987 in words is "eight hundred million, nine hundred eighty-seven thousand, nine hundred eighty-seven".