685979570 has 16 divisors (see below), whose sum is σ = 1261035648. Its totient is φ = 268553520.

The previous prime is 685979557. The next prime is 685979573. The reversal of 685979570 is 75979586.

It is not an unprimeable number, because it can be changed into a prime (685979573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729296 + ... + 730235.

It is an arithmetic number, because the mean of its divisors is an integer number (78814728).

Almost surely, 2^685979570 is an apocalyptic number.

685979570 is a deficient number, since it is larger than the sum of its proper divisors (575056078).

685979570 is a wasteful number, since it uses less digits than its factorization.

685979570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459585.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The square root of 685979570 is about 26191.2116940015. The cubic root of 685979570 is about 881.9359796738.

The spelling of 685979570 in words is "six hundred eighty-five million, nine hundred seventy-nine thousand, five hundred seventy".