989456121 has 16 divisors (see below), whose sum is σ = 1469644800. Its totient is φ = 657934704.

The previous prime is 989456093. The next prime is 989456131. The reversal of 989456121 is 121654989.

989456121 is a `hidden beast` number, since 9 + 89 + 4 + 561 + 2 + 1 = 666.

It is not a de Polignac number, because 989456121 - 2⁶ = 989456057 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989456131) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36601 + ... + 57606.

It is an arithmetic number, because the mean of its divisors is an integer number (91852800).

Almost surely, 2^989456121 is an apocalyptic number.

It is an amenable number.

989456121 is a deficient number, since it is larger than the sum of its proper divisors (480188679).

989456121 is a wasteful number, since it uses less digits than its factorization.

989456121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94605 (or 94599 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 989456121 is about 31455.6214530885. The cubic root of 989456121 is about 996.4729481979.

The spelling of 989456121 in words is "nine hundred eighty-nine million, four hundred fifty-six thousand, one hundred twenty-one".