989138611 has 4 divisors (see below), whose sum is σ = 996927232. Its totient is φ = 981349992.

The previous prime is 989138609. The next prime is 989138627. The reversal of 989138611 is 116831989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 989138611 - 2¹ = 989138609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989138011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3894120 + ... + 3894373.

It is an arithmetic number, because the mean of its divisors is an integer number (249231808).

Almost surely, 2^989138611 is an apocalyptic number.

989138611 is a deficient number, since it is larger than the sum of its proper divisors (7788621).

989138611 is a wasteful number, since it uses less digits than its factorization.

989138611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7788620.

The product of its digits is 93312, while the sum is 46.

The square root of 989138611 is about 31450.5740965090. The cubic root of 989138611 is about 996.3663495768.

The spelling of 989138611 in words is "nine hundred eighty-nine million, one hundred thirty-eight thousand, six hundred eleven".