987579 has 16 divisors (see below), whose sum is σ = 1484800. Its totient is φ = 648648.

The previous prime is 987559. The next prime is 987587. The reversal of 987579 is 975789.

It is not a de Polignac number, because 987579 - 2⁹ = 987067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (92800).

2⁹⁸⁷⁵⁷⁹ is an apocalyptic number.

987579 is a deficient number, since it is larger than the sum of its proper divisors (497221).

987579 is a wasteful number, since it uses less digits than its factorization.

987579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 545 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 987579 is about 993.7700941365. The cubic root of 987579 is about 99.5842405026.

The spelling of 987579 in words is "nine hundred eighty-seven thousand, five hundred seventy-nine".