987879 has 4 divisors (see below), whose sum is σ = 1317176. Its totient is φ = 658584.

The previous prime is 987869. The next prime is 987911. The reversal of 987879 is 978789.

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

It is not a de Polignac number, because 987879 - 2¹² = 983783 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987809) 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, 164644 + ... + 164649.

It is an arithmetic number, because the mean of its divisors is an integer number (329294).

2⁹⁸⁷⁸⁷⁹ is an apocalyptic number.

987879 is a deficient number, since it is larger than the sum of its proper divisors (329297).

987879 is a wasteful number, since it uses less digits than its factorization.

987879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329296.

The product of its digits is 254016, while the sum is 48.

The square root of 987879 is about 993.9210230194. The cubic root of 987879 is about 99.5943231551.

The spelling of 987879 in words is "nine hundred eighty-seven thousand, eight hundred seventy-nine".