989951121 has 12 divisors (see below), whose sum is σ = 1435865860.
Its totient is φ = 657227520.
The previous prime is 989951113. The next prime is 989951173. The reversal of 989951121 is 121159989.
It can be written as a sum of positive squares in 2 ways, for example, as 902341521 + 87609600 = 30039^2 + 9360^2
It is not a de Polignac number, because 989951121 - 23 = 989951113 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (989951101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is an upside-down number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226036 + ... + 230373.
Almost surely, 2989951121 is an apocalyptic number.
It is an amenable number.
989951121 is a deficient number, since it is larger than the sum of its proper divisors (445914739).
989951121 is a wasteful number, since it uses less digits than its factorization.
989951121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 456656 (or 456653 counting only the distinct ones).
The product of its digits is 58320, while the sum is 45.
The square root of 989951121 is about 31463.4886972186.
The cubic root of 989951121 is about 996.6390906094.
The spelling of 989951121 in words is "nine hundred eighty-nine million, nine hundred fifty-one thousand, one hundred twenty-one".