961686 has 32 divisors (see below), whose sum is σ = 2332800. Its totient is φ = 291240.

The previous prime is 961679. The next prime is 961687. The reversal of 961686 is 686169.

It is a self number, because there is not a number n which added to its sum of digits gives 961686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961687) 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 15 ways as a sum of consecutive naturals, for example, 216 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁹⁶¹⁶⁸⁶ is an apocalyptic number.

961686 is an abundant number, since it is smaller than the sum of its proper divisors (1371114).

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

961686 is a wasteful number, since it uses less digits than its factorization.

961686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1635 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 961686 is about 980.6559029548. The cubic root of 961686 is about 98.7061996642.

The spelling of 961686 in words is "nine hundred sixty-one thousand, six hundred eighty-six".