992838989 has 8 divisors (see below), whose sum is σ = 1019112600. Its totient is φ = 966888000.

The previous prime is 992838967. The next prime is 992839007. The reversal of 992838989 is 989838299.

It can be written as a sum of positive squares in 4 ways, for example, as 14212900 + 978626089 = 3770^2 + 31283^2 .

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-992838989 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 (992838929) 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, 74414 + ... + 86735.

It is an arithmetic number, because the mean of its divisors is an integer number (127389075).

Almost surely, 2^992838989 is an apocalyptic number.

It is an amenable number.

992838989 is a deficient number, since it is larger than the sum of its proper divisors (26273611).

992838989 is a wasteful number, since it uses less digits than its factorization.

992838989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161311.

The product of its digits is 20155392, while the sum is 65.

The square root of 992838989 is about 31509.3476447863. The cubic root of 992838989 is about 997.6072757703.

The spelling of 992838989 in words is "nine hundred ninety-two million, eight hundred thirty-eight thousand, nine hundred eighty-nine".