686266723 has 2 divisors, whose sum is σ = 686266724. Its totient is φ = 686266722.

The previous prime is 686266673. The next prime is 686266771. The reversal of 686266723 is 327662686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686266723 - 2²¹ = 684169571 is a prime.

It is not a weakly prime, because it can be changed into another prime (686267723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343133361 + 343133362.

It is an arithmetic number, because the mean of its divisors is an integer number (343133362).

Almost surely, 2^686266723 is an apocalyptic number.

686266723 is a deficient number, since it is larger than the sum of its proper divisors (1).

686266723 is an equidigital number, since it uses as much as digits as its factorization.

686266723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 686266723 is about 26196.6929783131. The cubic root of 686266723 is about 882.0590228103.

The spelling of 686266723 in words is "six hundred eighty-six million, two hundred sixty-six thousand, seven hundred twenty-three".