986643 has 12 divisors (see below), whose sum is σ = 1628848. Its totient is φ = 563760.

The previous prime is 986641. The next prime is 986659. The reversal of 986643 is 346689.

986643 is a `hidden beast` number, since 9 + 8 + 6 + 643 = 666.

986643 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 986643 - 2¹ = 986641 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 986598 and 986607.

It is not an unprimeable number, because it can be changed into a prime (986641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7768 + ... + 7893.

2⁹⁸⁶⁶⁴³ is an apocalyptic number.

986643 is a deficient number, since it is larger than the sum of its proper divisors (642205).

986643 is a wasteful number, since it uses less digits than its factorization.

986643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15674 (or 15671 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 986643 is about 993.2990486253. The cubic root of 986643 is about 99.5527694972.

The spelling of 986643 in words is "nine hundred eighty-six thousand, six hundred forty-three".