685709674 has 32 divisors (see below), whose sum is σ = 1118912256. Its totient is φ = 313295040.

The previous prime is 685709663. The next prime is 685709683. The reversal of 685709674 is 476907586.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162964 + ... + 2163280.

It is an arithmetic number, because the mean of its divisors is an integer number (34966008).

Almost surely, 2^685709674 is an apocalyptic number.

685709674 is a deficient number, since it is larger than the sum of its proper divisors (433202582).

685709674 is a wasteful number, since it uses less digits than its factorization.

685709674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 685709674 is about 26186.0587717969. The cubic root of 685709674 is about 881.8202997382.

The spelling of 685709674 in words is "six hundred eighty-five million, seven hundred nine thousand, six hundred seventy-four".