987311 has 8 divisors (see below), whose sum is σ = 1071840. Its totient is φ = 904032.

The previous prime is 987299. The next prime is 987313. The reversal of 987311 is 113789.

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 987311 - 2¹⁰ = 986287 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987313) 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, 2030 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (133980).

2⁹⁸⁷³¹¹ is an apocalyptic number.

987311 is a deficient number, since it is larger than the sum of its proper divisors (84529).

987311 is a wasteful number, since it uses less digits than its factorization.

987311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its digits is 1512, while the sum is 29.

The square root of 987311 is about 993.6352449466. The cubic root of 987311 is about 99.5752316061.

The spelling of 987311 in words is "nine hundred eighty-seven thousand, three hundred eleven".