986631 has 16 divisors (see below), whose sum is σ = 1397760. Its totient is φ = 617760.

The previous prime is 986617. The next prime is 986633. The reversal of 986631 is 136689.

986631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 986631 - 2⁵ = 986599 is a prime.

It is a super-2 number, since 2×986631² = 1946881460322, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 986592 and 986601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5361 + ... + 5541.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2⁹⁸⁶⁶³¹ is an apocalyptic number.

986631 is a deficient number, since it is larger than the sum of its proper divisors (411129).

986631 is a wasteful number, since it uses less digits than its factorization.

986631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286.

The product of its digits is 7776, while the sum is 33.

The square root of 986631 is about 993.2930081300. The cubic root of 986631 is about 99.5523658936.

The spelling of 986631 in words is "nine hundred eighty-six thousand, six hundred thirty-one".