685672193 has 4 divisors (see below), whose sum is σ = 686626560. Its totient is φ = 684717828.

The previous prime is 685672189. The next prime is 685672199. The reversal of 685672193 is 391276586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685672193 - 2² = 685672189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685672199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476105 + ... + 477542.

It is an arithmetic number, because the mean of its divisors is an integer number (171656640).

Almost surely, 2^685672193 is an apocalyptic number.

It is an amenable number.

685672193 is a deficient number, since it is larger than the sum of its proper divisors (954367).

685672193 is an equidigital number, since it uses as much as digits as its factorization.

685672193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954366.

The product of its digits is 544320, while the sum is 47.

The square root of 685672193 is about 26185.3430949453. The cubic root of 685672193 is about 881.8042326328.

The spelling of 685672193 in words is "six hundred eighty-five million, six hundred seventy-two thousand, one hundred ninety-three".