986691 has 4 divisors (see below), whose sum is σ = 1315592. Its totient is φ = 657792.

The previous prime is 986659. The next prime is 986693. The reversal of 986691 is 196689.

986691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196689 = 3 ⋅65563.

It is not a de Polignac number, because 986691 - 2⁵ = 986659 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164446 + ... + 164451.

It is an arithmetic number, because the mean of its divisors is an integer number (328898).

2⁹⁸⁶⁶⁹¹ is an apocalyptic number.

986691 is a deficient number, since it is larger than the sum of its proper divisors (328901).

986691 is a wasteful number, since it uses less digits than its factorization.

986691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328900.

The product of its digits is 23328, while the sum is 39.

The square root of 986691 is about 993.3232102392. The cubic root of 986691 is about 99.5543838790.

The spelling of 986691 in words is "nine hundred eighty-six thousand, six hundred ninety-one".