685489047 has 8 divisors (see below), whose sum is σ = 938687856. Its totient is φ = 444641472.

The previous prime is 685489043. The next prime is 685489061. The reversal of 685489047 is 740984586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685489047 - 2² = 685489043 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685489043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3087678 + ... + 3087899.

It is an arithmetic number, because the mean of its divisors is an integer number (117335982).

Almost surely, 2^685489047 is an apocalyptic number.

685489047 is a deficient number, since it is larger than the sum of its proper divisors (253198809).

685489047 is a wasteful number, since it uses less digits than its factorization.

685489047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6175617.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 685489047 is about 26181.8457523529. The cubic root of 685489047 is about 881.7257144036.

The spelling of 685489047 in words is "six hundred eighty-five million, four hundred eighty-nine thousand, forty-seven".