987513 has 16 divisors (see below), whose sum is σ = 1419840. Its totient is φ = 610368.

The previous prime is 987509. The next prime is 987523. The reversal of 987513 is 315789.

It is not a de Polignac number, because 987513 - 2² = 987509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (987523) 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 15 ways as a sum of consecutive naturals, for example, 14706 + ... + 14772.

It is an arithmetic number, because the mean of its divisors is an integer number (88740).

2⁹⁸⁷⁵¹³ is an apocalyptic number.

It is an amenable number.

987513 is a deficient number, since it is larger than the sum of its proper divisors (432327).

987513 is an equidigital number, since it uses as much as digits as its factorization.

987513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 87 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 987513 is about 993.7368867059. The cubic root of 987513 is about 99.5820220451.

The spelling of 987513 in words is "nine hundred eighty-seven thousand, five hundred thirteen".