989753121 has 48 divisors (see below), whose sum is σ = 1709077120. Its totient is φ = 554402880.

The previous prime is 989753117. The next prime is 989753123. The reversal of 989753121 is 121357989.

989753121 is a `hidden beast` number, since 9 + 8 + 97 + 531 + 21 = 666.

It is not a de Polignac number, because 989753121 - 2² = 989753117 is a prime.

It is a super-2 number, since 2×989753121² = 1959222481058481282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989753123) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3377851 + ... + 3378143.

Almost surely, 2^989753121 is an apocalyptic number.

It is an amenable number.

989753121 is a deficient number, since it is larger than the sum of its proper divisors (719323999).

989753121 is an equidigital number, since it uses as much as digits as its factorization.

989753121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 364 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 989753121 is about 31460.3420356486. The cubic root of 989753121 is about 996.5726402923.

The spelling of 989753121 in words is "nine hundred eighty-nine million, seven hundred fifty-three thousand, one hundred twenty-one".