987751 has 8 divisors (see below), whose sum is σ = 1058400. Its totient is φ = 918528.

The previous prime is 987739. The next prime is 987793. The reversal of 987751 is 157789.

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

It is a cyclic number.

It is not a de Polignac number, because 987751 - 2¹¹ = 985703 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 987751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987251) 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 in 7 ways as a sum of consecutive naturals, for example, 1350 + ... + 1948.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2⁹⁸⁷⁷⁵¹ is an apocalyptic number.

987751 is a deficient number, since it is larger than the sum of its proper divisors (70649).

987751 is a wasteful number, since it uses less digits than its factorization.

987751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 17640, while the sum is 37.

The square root of 987751 is about 993.8566294994. The cubic root of 987751 is about 99.5900214731.

The spelling of 987751 in words is "nine hundred eighty-seven thousand, seven hundred fifty-one".