685480427 has 2 divisors, whose sum is σ = 685480428. Its totient is φ = 685480426.

The previous prime is 685480421. The next prime is 685480469. The reversal of 685480427 is 724084586.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685480427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (685480421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342740213 + 342740214.

It is an arithmetic number, because the mean of its divisors is an integer number (342740214).

Almost surely, 2^685480427 is an apocalyptic number.

685480427 is a deficient number, since it is larger than the sum of its proper divisors (1).

685480427 is an equidigital number, since it uses as much as digits as its factorization.

685480427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 685480427 is about 26181.6811339532. The cubic root of 685480427 is about 881.7220184985.

The spelling of 685480427 in words is "six hundred eighty-five million, four hundred eighty thousand, four hundred twenty-seven".