685372647 has 8 divisors (see below), whose sum is σ = 914321520. Its totient is φ = 456669440.

The previous prime is 685372621. The next prime is 685372651. The reversal of 685372647 is 746273586.

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

It is a cyclic number.

It is not a de Polignac number, because 685372647 - 2¹⁴ = 685356263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685372596 and 685372605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685372447) 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, 54804 + ... + 66137.

It is an arithmetic number, because the mean of its divisors is an integer number (114290190).

Almost surely, 2^685372647 is an apocalyptic number.

685372647 is a deficient number, since it is larger than the sum of its proper divisors (228948873).

685372647 is a wasteful number, since it uses less digits than its factorization.

685372647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122833.

The product of its digits is 1693440, while the sum is 48.

The square root of 685372647 is about 26179.6227436531. The cubic root of 685372647 is about 881.6758042053.

The spelling of 685372647 in words is "six hundred eighty-five million, three hundred seventy-two thousand, six hundred forty-seven".