989854209 has 16 divisors (see below), whose sum is σ = 1477650240. Its totient is φ = 654863040.

The previous prime is 989854207. The next prime is 989854213. The reversal of 989854209 is 902458989.

989854209 is a `hidden beast` number, since 9 + 8 + 98 + 542 + 0 + 9 = 666.

It is not a de Polignac number, because 989854209 - 2¹ = 989854207 is a prime.

It is a super-2 number, since 2×989854209² = 1959622710150031362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989854207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136392 + ... + 143465.

It is an arithmetic number, because the mean of its divisors is an integer number (92353140).

Almost surely, 2^989854209 is an apocalyptic number.

It is an amenable number.

989854209 is a deficient number, since it is larger than the sum of its proper divisors (487796031).

989854209 is a wasteful number, since it uses less digits than its factorization.

989854209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279997 (or 279991 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 989854209 is about 31461.9485887318. The cubic root of 989854209 is about 996.6065673068.

The spelling of 989854209 in words is "nine hundred eighty-nine million, eight hundred fifty-four thousand, two hundred nine".