987444789 has 8 divisors (see below), whose sum is σ = 1352176800. Its totient is φ = 640504656.

The previous prime is 987444769. The next prime is 987444817.

987444789 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 987444789 - 2²¹ = 985347637 is a prime.

It is a super-2 number, since 2×987444789² = 1950094422646509042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987444769) 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, 4447839 + ... + 4448060.

It is an arithmetic number, because the mean of its divisors is an integer number (169022100).

Almost surely, 2^987444789 is an apocalyptic number.

It is an amenable number.

987444789 is a deficient number, since it is larger than the sum of its proper divisors (364732011).

987444789 is a wasteful number, since it uses less digits than its factorization.

987444789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895939.

The product of its digits is 16257024, while the sum is 60.

The square root of 987444789 is about 31423.6342423979. The cubic root of 987444789 is about 995.7972916530.

The spelling of 987444789 in words is "nine hundred eighty-seven million, four hundred forty-four thousand, seven hundred eighty-nine".