5686921 has 2 divisors, whose sum is σ = 5686922. Its totient is φ = 5686920.

The previous prime is 5686873. The next prime is 5686931. The reversal of 5686921 is 1296865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 2673225 = 1736^2 + 1635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5686921 is a prime.

It is a super-3 number, since 3×5686921³ (a number of 21 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (5686931) 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 as a sum of consecutive naturals, namely, 2843460 + 2843461.

It is an arithmetic number, because the mean of its divisors is an integer number (2843461).

Almost surely, 2^5686921 is an apocalyptic number.

It is an amenable number.

5686921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5686921 is an equidigital number, since it uses as much as digits as its factorization.

5686921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 5686921 is about 2384.7266090686. The cubic root of 5686921 is about 178.4948670803.

The spelling of 5686921 in words is "five million, six hundred eighty-six thousand, nine hundred twenty-one".