685397069 has 8 divisors (see below), whose sum is σ = 795002688. Its totient is φ = 578714400.

The previous prime is 685397059. The next prime is 685397117. The reversal of 685397069 is 960793586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685397069 is a prime.

It is a super-2 number, since 2×685397069² = 939538284387581522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685397069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685397059) 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, 730232 + ... + 731169.

It is an arithmetic number, because the mean of its divisors is an integer number (99375336).

Almost surely, 2^685397069 is an apocalyptic number.

It is an amenable number.

685397069 is a deficient number, since it is larger than the sum of its proper divisors (109605619).

685397069 is a wasteful number, since it uses less digits than its factorization.

685397069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461475.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 685397069 is about 26180.0891709711. The cubic root of 685397069 is about 881.6862763821.

The spelling of 685397069 in words is "six hundred eighty-five million, three hundred ninety-seven thousand, sixty-nine".