989853191 has 2 divisors, whose sum is σ = 989853192. Its totient is φ = 989853190.

The previous prime is 989853167. The next prime is 989853223. The reversal of 989853191 is 191358989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989853191 - 2¹⁰ = 989852167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989853121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494926595 + 494926596.

It is an arithmetic number, because the mean of its divisors is an integer number (494926596).

Almost surely, 2^989853191 is an apocalyptic number.

989853191 is a deficient number, since it is larger than the sum of its proper divisors (1).

989853191 is an equidigital number, since it uses as much as digits as its factorization.

989853191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 53.

The square root of 989853191 is about 31461.9324104544. The cubic root of 989853191 is about 996.6062256585.

The spelling of 989853191 in words is "nine hundred eighty-nine million, eight hundred fifty-three thousand, one hundred ninety-one".