685213503 has 8 divisors (see below), whose sum is σ = 983896368. Its totient is φ = 421669824.

The previous prime is 685213483. The next prime is 685213519. The reversal of 685213503 is 305312586.

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

It is not a de Polignac number, because 685213503 - 2²¹ = 683116351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685213103) 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, 8784750 + ... + 8784827.

It is an arithmetic number, because the mean of its divisors is an integer number (122987046).

Almost surely, 2^685213503 is an apocalyptic number.

685213503 is a deficient number, since it is larger than the sum of its proper divisors (298682865).

685213503 is a wasteful number, since it uses less digits than its factorization.

685213503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17569593.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 685213503 is about 26176.5831039882. The cubic root of 685213503 is about 881.6075570133.

The spelling of 685213503 in words is "six hundred eighty-five million, two hundred thirteen thousand, five hundred three".