685027127 has 2 divisors, whose sum is σ = 685027128. Its totient is φ = 685027126.

The previous prime is 685027103. The next prime is 685027129. The reversal of 685027127 is 721720586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685027127 is a prime.

Together with 685027129, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685027129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342513563 + 342513564.

It is an arithmetic number, because the mean of its divisors is an integer number (342513564).

Almost surely, 2^685027127 is an apocalyptic number.

685027127 is a deficient number, since it is larger than the sum of its proper divisors (1).

685027127 is an equidigital number, since it uses as much as digits as its factorization.

685027127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 685027127 is about 26173.0228861704. The cubic root of 685027127 is about 881.5276182356.

The spelling of 685027127 in words is "six hundred eighty-five million, twenty-seven thousand, one hundred twenty-seven".