685163434 has 4 divisors (see below), whose sum is σ = 1027745154. Its totient is φ = 342581716.

The previous prime is 685163417. The next prime is 685163449. The reversal of 685163434 is 434361586.

685163434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 632673409 + 52490025 = 25153^2 + 7245^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171290857 + ... + 171290860.

Almost surely, 2^685163434 is an apocalyptic number.

685163434 is a deficient number, since it is larger than the sum of its proper divisors (342581720).

685163434 is a wasteful number, since it uses less digits than its factorization.

685163434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342581719.

The product of its digits is 207360, while the sum is 40.

The square root of 685163434 is about 26175.6267164704. The cubic root of 685163434 is about 881.5860832761.

The spelling of 685163434 in words is "six hundred eighty-five million, one hundred sixty-three thousand, four hundred thirty-four".