989491202409 has 8 divisors (see below), whose sum is σ = 1332130551232. Its totient is φ = 653256327600.

The previous prime is 989491202389. The next prime is 989491202419. The reversal of 989491202409 is 904202194989.

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

It is not a de Polignac number, because 989491202409 - 2⁷ = 989491202281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989491202419) 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, 1601118142 + ... + 1601118759.

It is an arithmetic number, because the mean of its divisors is an integer number (166516318904).

Almost surely, 2^989491202409 is an apocalyptic number.

It is an amenable number.

989491202409 is a deficient number, since it is larger than the sum of its proper divisors (342639348823).

989491202409 is a wasteful number, since it uses less digits than its factorization.

989491202409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202237007.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 989491202409 in words is "nine hundred eighty-nine billion, four hundred ninety-one million, two hundred two thousand, four hundred nine".