989894911 has 2 divisors, whose sum is σ = 989894912. Its totient is φ = 989894910.

The previous prime is 989894879. The next prime is 989894947. The reversal of 989894911 is 119498989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989894911 - 2⁵ = 989894879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989894981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494947455 + 494947456.

It is an arithmetic number, because the mean of its divisors is an integer number (494947456).

Almost surely, 2^989894911 is an apocalyptic number.

989894911 is a deficient number, since it is larger than the sum of its proper divisors (1).

989894911 is an equidigital number, since it uses as much as digits as its factorization.

989894911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 58.

The square root of 989894911 is about 31462.5954269510. The cubic root of 989894911 is about 996.6202270034.

The spelling of 989894911 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred eleven".