989934009 has 8 divisors (see below), whose sum is σ = 1323063840. Its totient is φ = 658380096.

The previous prime is 989933999. The next prime is 989934019. The reversal of 989934009 is 900439989.

It is an interprime number because it is at equal distance from previous prime (989933999) and next prime (989934019).

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

It is not a de Polignac number, because 989934009 - 2²⁸ = 721498553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989934019) 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, 392512 + ... + 395025.

It is an arithmetic number, because the mean of its divisors is an integer number (165382980).

Almost surely, 2^989934009 is an apocalyptic number.

It is an amenable number.

989934009 is a deficient number, since it is larger than the sum of its proper divisors (333129831).

989934009 is a wasteful number, since it uses less digits than its factorization.

989934009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787959.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 989934009 is about 31463.2167617998. The cubic root of 989934009 is about 996.6333480409.

The spelling of 989934009 in words is "nine hundred eighty-nine million, nine hundred thirty-four thousand, nine".