989617 has 4 divisors (see below), whose sum is σ = 1013796. Its totient is φ = 965440.

The previous prime is 989581. The next prime is 989623. The reversal of 989617 is 716989.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 665856 = 569^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 989617 - 2¹⁵ = 956849 is a prime.

It is a Duffinian number.

989617 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 989617.

It is not an unprimeable number, because it can be changed into a prime (989647) 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 3 ways as a sum of consecutive naturals, for example, 12028 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (253449).

2⁹⁸⁹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

989617 is a deficient number, since it is larger than the sum of its proper divisors (24179).

989617 is a wasteful number, since it uses less digits than its factorization.

989617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24178.

The product of its digits is 27216, while the sum is 40.

The square root of 989617 is about 994.7949537468. The cubic root of 989617 is about 99.6526951901.

The spelling of 989617 in words is "nine hundred eighty-nine thousand, six hundred seventeen".