686355269 has 2 divisors, whose sum is σ = 686355270. Its totient is φ = 686355268.

The previous prime is 686355223. The next prime is 686355277. The reversal of 686355269 is 962553686.

686355269 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., 503104900 + 183250369 = 22430^2 + 13537^2 .

It is a cyclic number.

It is not a de Polignac number, because 686355269 - 2⁸ = 686355013 is a prime.

It is a super-2 number, since 2×686355269² = 942167110568124722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686355869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343177634 + 343177635.

It is an arithmetic number, because the mean of its divisors is an integer number (343177635).

Almost surely, 2^686355269 is an apocalyptic number.

It is an amenable number.

686355269 is a deficient number, since it is larger than the sum of its proper divisors (1).

686355269 is an equidigital number, since it uses as much as digits as its factorization.

686355269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 50.

The square root of 686355269 is about 26198.3829462812. The cubic root of 686355269 is about 882.0969572541.

The spelling of 686355269 in words is "six hundred eighty-six million, three hundred fifty-five thousand, two hundred sixty-nine".