8686961 has 2 divisors, whose sum is σ = 8686962. Its totient is φ = 8686960.

The previous prime is 8686901. The next prime is 8686981. The reversal of 8686961 is 1696868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 672400 = 2831^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 8686961 - 2¹⁸ = 8424817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8686901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4343480 + 4343481.

It is an arithmetic number, because the mean of its divisors is an integer number (4343481).

Almost surely, 2^8686961 is an apocalyptic number.

It is an amenable number.

8686961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8686961 is an equidigital number, since it uses as much as digits as its factorization.

8686961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 8686961 is about 2947.3650944530. The cubic root of 8686961 is about 205.5682114222.

The spelling of 8686961 in words is "eight million, six hundred eighty-six thousand, nine hundred sixty-one".