685630617 has 16 divisors (see below), whose sum is σ = 1045140480. Its totient is φ = 391650192.

The previous prime is 685630597. The next prime is 685630619. The reversal of 685630617 is 716036586.

It is not a de Polignac number, because 685630617 - 2¹² = 685626521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685630619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99634 + ... + 106292.

It is an arithmetic number, because the mean of its divisors is an integer number (65321280).

Almost surely, 2^685630617 is an apocalyptic number.

It is an amenable number.

685630617 is a deficient number, since it is larger than the sum of its proper divisors (359509863).

685630617 is a wasteful number, since it uses less digits than its factorization.

685630617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11572.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 685630617 is about 26184.5492036812. The cubic root of 685630617 is about 881.7864094251.

It can be divided in two parts, 6856 and 30617, that added together give a palindrome (37473).

The spelling of 685630617 in words is "six hundred eighty-five million, six hundred thirty thousand, six hundred seventeen".