685267453 has 6 divisors (see below), whose sum is σ = 742035354. Its totient is φ = 632554416.

The previous prime is 685267447. The next prime is 685267463. The reversal of 685267453 is 354762586.

It can be written as a sum of positive squares in 3 ways, for example, as 17665209 + 667602244 = 4203^2 + 25838^2 .

It is a de Polignac number, because none of the positive numbers 2^k-685267453 is a prime.

It is a super-2 number, since 2×685267453² = 939182964282214418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685267463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2027250 + ... + 2027587.

It is an arithmetic number, because the mean of its divisors is an integer number (123672559).

Almost surely, 2^685267453 is an apocalyptic number.

It is an amenable number.

685267453 is a deficient number, since it is larger than the sum of its proper divisors (56767901).

685267453 is a wasteful number, since it uses less digits than its factorization.

685267453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054863 (or 4054850 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The square root of 685267453 is about 26177.6135848935. The cubic root of 685267453 is about 881.6306940741.

It can be divided in two parts, 6852 and 67453, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 685267453 in words is "six hundred eighty-five million, two hundred sixty-seven thousand, four hundred fifty-three".