685839425 has 12 divisors (see below), whose sum is σ = 851069040. Its totient is φ = 548266320.

The previous prime is 685839397. The next prime is 685839439. The reversal of 685839425 is 524938586.

It is not a de Polignac number, because 685839425 - 2⁶ = 685839361 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27074 + ... + 45876.

It is an arithmetic number, because the mean of its divisors is an integer number (70922420).

Almost surely, 2^685839425 is an apocalyptic number.

It is an amenable number.

685839425 is a deficient number, since it is larger than the sum of its proper divisors (165229615).

685839425 is a wasteful number, since it uses less digits than its factorization.

685839425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20272 (or 20267 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The square root of 685839425 is about 26188.5361370200. The cubic root of 685839425 is about 881.8759160115.

The spelling of 685839425 in words is "six hundred eighty-five million, eight hundred thirty-nine thousand, four hundred twenty-five".