989424989 has 8 divisors (see below), whose sum is σ = 1144395840. Its totient is φ = 837860256.

The previous prime is 989424983. The next prime is 989425013.

989424989 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 not a de Polignac number, because 989424989 - 2²⁴ = 972647773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989424983) 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, 850904 + ... + 852065.

It is an arithmetic number, because the mean of its divisors is an integer number (143049480).

Almost surely, 2^989424989 is an apocalyptic number.

It is an amenable number.

989424989 is a deficient number, since it is larger than the sum of its proper divisors (154970851).

989424989 is a wasteful number, since it uses less digits than its factorization.

989424989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703059.

The product of its digits is 13436928, while the sum is 62.

The square root of 989424989 is about 31455.1265932916. The cubic root of 989424989 is about 996.4624971630.

The spelling of 989424989 in words is "nine hundred eighty-nine million, four hundred twenty-four thousand, nine hundred eighty-nine".