987824489 has 4 divisors (see below), whose sum is σ = 994931280. Its totient is φ = 980717700.

The previous prime is 987824473. The next prime is 987824533. The reversal of 987824489 is 984428789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 987824489 - 2⁴ = 987824473 is a prime.

It is a super-2 number, since 2×987824489² = 1951594442136222242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (987821489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553187 + ... + 3553464.

It is an arithmetic number, because the mean of its divisors is an integer number (248732820).

Almost surely, 2^987824489 is an apocalyptic number.

It is an amenable number.

987824489 is a deficient number, since it is larger than the sum of its proper divisors (7106791).

987824489 is a wasteful number, since it uses less digits than its factorization.

987824489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106790.

The product of its digits is 9289728, while the sum is 59.

The square root of 987824489 is about 31429.6752926275. The cubic root of 987824489 is about 995.9249125531.

The spelling of 987824489 in words is "nine hundred eighty-seven million, eight hundred twenty-four thousand, four hundred eighty-nine".