987242789 has 8 divisors (see below), whose sum is σ = 1079053920. Its totient is φ = 897698736.

The previous prime is 987242779. The next prime is 987242801.

987242789 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987242789 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 (987242759) 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 7 ways as a sum of consecutive naturals, for example, 565859 + ... + 567600.

It is an arithmetic number, because the mean of its divisors is an integer number (134881740).

Almost surely, 2^987242789 is an apocalyptic number.

It is an amenable number.

987242789 is a deficient number, since it is larger than the sum of its proper divisors (91811131).

987242789 is a wasteful number, since it uses less digits than its factorization.

987242789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133539.

The product of its digits is 4064256, while the sum is 56.

The square root of 987242789 is about 31420.4199367227. The cubic root of 987242789 is about 995.7293841362.

The spelling of 987242789 in words is "nine hundred eighty-seven million, two hundred forty-two thousand, seven hundred eighty-nine".