987898787 has 4 divisors (see below), whose sum is σ = 1039893480. Its totient is φ = 935904096.

The previous prime is 987898763. The next prime is 987898789. The reversal of 987898787 is 787898789.

It is a happy number.

987898787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

987898787 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987898787 - 2⁸ = 987898531 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987898787.

It is not an unprimeable number, because it can be changed into a prime (987898789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25997318 + ... + 25997355.

It is an arithmetic number, because the mean of its divisors is an integer number (259973370).

Almost surely, 2^987898787 is an apocalyptic number.

987898787 is a deficient number, since it is larger than the sum of its proper divisors (51994693).

987898787 is a wasteful number, since it uses less digits than its factorization.

987898787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51994692.

The product of its digits is 113799168, while the sum is 71.

The square root of 987898787 is about 31430.8572425252. The cubic root of 987898787 is about 995.9498810149.

The spelling of 987898787 in words is "nine hundred eighty-seven million, eight hundred ninety-eight thousand, seven hundred eighty-seven".