686115337 has 2 divisors, whose sum is σ = 686115338. Its totient is φ = 686115336.

The previous prime is 686115319. The next prime is 686115347. The reversal of 686115337 is 733511686.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 479215881 + 206899456 = 21891^2 + 14384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686115337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686115337.

It is not a weakly prime, because it can be changed into another prime (686115347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343057668 + 343057669.

It is an arithmetic number, because the mean of its divisors is an integer number (343057669).

Almost surely, 2^686115337 is an apocalyptic number.

It is an amenable number.

686115337 is a deficient number, since it is larger than the sum of its proper divisors (1).

686115337 is an equidigital number, since it uses as much as digits as its factorization.

686115337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 686115337 is about 26193.8034084399. The cubic root of 686115337 is about 881.9941592022.

The spelling of 686115337 in words is "six hundred eighty-six million, one hundred fifteen thousand, three hundred thirty-seven".