686627941 has 2 divisors, whose sum is σ = 686627942. Its totient is φ = 686627940.

The previous prime is 686627863. The next prime is 686627957. The reversal of 686627941 is 149726686.

686627941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571688100 + 114939841 = 23910^2 + 10721^2 .

It is a cyclic number.

It is not a de Polignac number, because 686627941 - 2⁹ = 686627429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686627341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343313970 + 343313971.

It is an arithmetic number, because the mean of its divisors is an integer number (343313971).

Almost surely, 2^686627941 is an apocalyptic number.

It is an amenable number.

686627941 is a deficient number, since it is larger than the sum of its proper divisors (1).

686627941 is an equidigital number, since it uses as much as digits as its factorization.

686627941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 686627941 is about 26203.5864148402. The cubic root of 686627941 is about 882.2137535684.

The spelling of 686627941 in words is "six hundred eighty-six million, six hundred twenty-seven thousand, nine hundred forty-one".