986609 has 8 divisors (see below), whose sum is σ = 1099560. Its totient is φ = 878976.

The previous prime is 986599. The next prime is 986617. The reversal of 986609 is 906689.

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 739600 = 497^2 + 860^2 .

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 986609 - 2⁴ = 986593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1685.

It is an arithmetic number, because the mean of its divisors is an integer number (137445).

2⁹⁸⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

986609 is a deficient number, since it is larger than the sum of its proper divisors (112951).

986609 is a wasteful number, since it uses less digits than its factorization.

986609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 986609 is about 993.2819337932. The cubic root of 986609 is about 99.5516259451.

The spelling of 986609 in words is "nine hundred eighty-six thousand, six hundred nine".