685133227 has 2 divisors, whose sum is σ = 685133228. Its totient is φ = 685133226.

The previous prime is 685133203. The next prime is 685133231. The reversal of 685133227 is 722331586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685133227 is a prime.

It is not a weakly prime, because it can be changed into another prime (685133287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342566613 + 342566614.

It is an arithmetic number, because the mean of its divisors is an integer number (342566614).

Almost surely, 2^685133227 is an apocalyptic number.

685133227 is a deficient number, since it is larger than the sum of its proper divisors (1).

685133227 is an equidigital number, since it uses as much as digits as its factorization.

685133227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 685133227 is about 26175.0497038688. The cubic root of 685133227 is about 881.5731275049.

The spelling of 685133227 in words is "six hundred eighty-five million, one hundred thirty-three thousand, two hundred twenty-seven".