981606 has 8 divisors (see below), whose sum is σ = 1963224. Its totient is φ = 327200.

The previous prime is 981601. The next prime is 981623. The reversal of 981606 is 606189.

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

981606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81795 + ... + 81806.

It is an arithmetic number, because the mean of its divisors is an integer number (245403).

2⁹⁸¹⁶⁰⁶ is an apocalyptic number.

981606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981606 is a wasteful number, since it uses less digits than its factorization.

981606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163606.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 981606 is about 990.7603141023. The cubic root of 981606 is about 99.3830684482.

The spelling of 981606 in words is "nine hundred eighty-one thousand, six hundred six".