686069941 has 2 divisors, whose sum is σ = 686069942. Its totient is φ = 686069940.

The previous prime is 686069927. The next prime is 686069957. The reversal of 686069941 is 149960686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616280625 + 69789316 = 24825^2 + 8354^2 .

It is a cyclic number.

It is not a de Polignac number, because 686069941 - 2²¹ = 683972789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686069141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343034970 + 343034971.

It is an arithmetic number, because the mean of its divisors is an integer number (343034971).

Almost surely, 2^686069941 is an apocalyptic number.

It is an amenable number.

686069941 is a deficient number, since it is larger than the sum of its proper divisors (1).

686069941 is an equidigital number, since it uses as much as digits as its factorization.

686069941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 686069941 is about 26192.9368532816. The cubic root of 686069941 is about 881.9747067439.

The spelling of 686069941 in words is "six hundred eighty-six million, sixty-nine thousand, nine hundred forty-one".