987823609 has 8 divisors (see below), whose sum is σ = 994779968. Its totient is φ = 980884080.

The previous prime is 987823597. The next prime is 987823631. The reversal of 987823609 is 906328789.

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 987823609 - 2¹¹ = 987821561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987820609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127834 + ... + 135340.

It is an arithmetic number, because the mean of its divisors is an integer number (124347496).

Almost surely, 2^987823609 is an apocalyptic number.

It is an amenable number.

987823609 is a deficient number, since it is larger than the sum of its proper divisors (6956359).

987823609 is a wasteful number, since it uses less digits than its factorization.

987823609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8415.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 987823609 is about 31429.6612931161. The cubic root of 987823609 is about 995.9246168142.

The spelling of 987823609 in words is "nine hundred eighty-seven million, eight hundred twenty-three thousand, six hundred nine".