989946017 has 8 divisors (see below), whose sum is σ = 997377000. Its totient is φ = 982525824.

The previous prime is 989946011. The next prime is 989946053. The reversal of 989946017 is 710649989.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78872161 + 911073856 = 8881^2 + 30184^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989946017 - 2¹⁰ = 989944993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989946017.

It is not an unprimeable number, because it can be changed into a prime (989946011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316859 + ... + 319967.

It is an arithmetic number, because the mean of its divisors is an integer number (124672125).

Almost surely, 2^989946017 is an apocalyptic number.

It is an amenable number.

989946017 is a deficient number, since it is larger than the sum of its proper divisors (7430983).

989946017 is a wasteful number, since it uses less digits than its factorization.

989946017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 989946017 is about 31463.4075872274. The cubic root of 989946017 is about 996.6373777791.

The spelling of 989946017 in words is "nine hundred eighty-nine million, nine hundred forty-six thousand, seventeen".