685670383 has 2 divisors, whose sum is σ = 685670384. Its totient is φ = 685670382.

The previous prime is 685670371. The next prime is 685670407. The reversal of 685670383 is 383076586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685670383 - 2⁵ = 685670351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685670483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342835191 + 342835192.

It is an arithmetic number, because the mean of its divisors is an integer number (342835192).

Almost surely, 2^685670383 is an apocalyptic number.

685670383 is a deficient number, since it is larger than the sum of its proper divisors (1).

685670383 is an equidigital number, since it uses as much as digits as its factorization.

685670383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 685670383 is about 26185.3085336033. The cubic root of 685670383 is about 881.8034567192.

The spelling of 685670383 in words is "six hundred eighty-five million, six hundred seventy thousand, three hundred eighty-three".