686040337 has 2 divisors, whose sum is σ = 686040338. Its totient is φ = 686040336.

The previous prime is 686040317. The next prime is 686040359. The reversal of 686040337 is 733040686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401240961 + 284799376 = 20031^2 + 16876^2 .

It is a cyclic number.

It is not a de Polignac number, because 686040337 - 2¹¹ = 686038289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686040296 and 686040305.

It is not a weakly prime, because it can be changed into another prime (686040317) 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, 343020168 + 343020169.

It is an arithmetic number, because the mean of its divisors is an integer number (343020169).

Almost surely, 2^686040337 is an apocalyptic number.

It is an amenable number.

686040337 is a deficient number, since it is larger than the sum of its proper divisors (1).

686040337 is an equidigital number, since it uses as much as digits as its factorization.

686040337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 686040337 is about 26192.3717330065. The cubic root of 686040337 is about 881.9620207901.

The spelling of 686040337 in words is "six hundred eighty-six million, forty thousand, three hundred thirty-seven".