685274983 has 4 divisors (see below), whose sum is σ = 689479288. Its totient is φ = 681070680.

The previous prime is 685274977. The next prime is 685275011. The reversal of 685274983 is 389472586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685274983 is a prime.

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 685274983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685274963) 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 3 ways as a sum of consecutive naturals, for example, 2101908 + ... + 2102233.

It is an arithmetic number, because the mean of its divisors is an integer number (172369822).

Almost surely, 2^685274983 is an apocalyptic number.

685274983 is a deficient number, since it is larger than the sum of its proper divisors (4204305).

685274983 is a wasteful number, since it uses less digits than its factorization.

685274983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204304.

The product of its digits is 2903040, while the sum is 52.

The square root of 685274983 is about 26177.7574096789. The cubic root of 685274983 is about 881.6339233022.

The spelling of 685274983 in words is "six hundred eighty-five million, two hundred seventy-four thousand, nine hundred eighty-three".