685616383 has 4 divisors (see below), whose sum is σ = 686963880. Its totient is φ = 684268888.

The previous prime is 685616377. The next prime is 685616389. The reversal of 685616383 is 383616586.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (685616377) and next prime (685616389).

It is a cyclic number.

It is not a de Polignac number, because 685616383 - 2²¹ = 683519231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685616389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672985 + ... + 674002.

It is an arithmetic number, because the mean of its divisors is an integer number (171740970).

Almost surely, 2^685616383 is an apocalyptic number.

685616383 is a deficient number, since it is larger than the sum of its proper divisors (1347497).

685616383 is a wasteful number, since it uses less digits than its factorization.

685616383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347496.

The product of its digits is 622080, while the sum is 46.

The square root of 685616383 is about 26184.2774007609. The cubic root of 685616383 is about 881.7803072887.

The spelling of 685616383 in words is "six hundred eighty-five million, six hundred sixteen thousand, three hundred eighty-three".