787987 has 8 divisors (see below), whose sum is σ = 843200. Its totient is φ = 734184.

The previous prime is 787981. The next prime is 787993. The reversal of 787987 is 789787.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (787981) and next prime (787993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (105400).

2⁷⁸⁷⁹⁸⁷ is an apocalyptic number.

787987 is a deficient number, since it is larger than the sum of its proper divisors (55213).

787987 is a wasteful number, since it uses less digits than its factorization.

787987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its digits is 197568, while the sum is 46.

The square root of 787987 is about 887.6863184707. The cubic root of 787987 is about 92.3647695253.

The spelling of 787987 in words is "seven hundred eighty-seven thousand, nine hundred eighty-seven".