685277711 has 2 divisors, whose sum is σ = 685277712. Its totient is φ = 685277710.

The previous prime is 685277707. The next prime is 685277717. The reversal of 685277711 is 117772586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685277711 - 2² = 685277707 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685277717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342638855 + 342638856.

It is an arithmetic number, because the mean of its divisors is an integer number (342638856).

Almost surely, 2^685277711 is an apocalyptic number.

685277711 is a deficient number, since it is larger than the sum of its proper divisors (1).

685277711 is an equidigital number, since it uses as much as digits as its factorization.

685277711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 44.

The square root of 685277711 is about 26177.8095149308. The cubic root of 685277711 is about 881.6350931947.

The spelling of 685277711 in words is "six hundred eighty-five million, two hundred seventy-seven thousand, seven hundred eleven".