685322623 has 4 divisors (see below), whose sum is σ = 685521328. Its totient is φ = 685123920.

The previous prime is 685322597. The next prime is 685322629. The reversal of 685322623 is 326223586.

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

It is a cyclic number.

It is not a de Polignac number, because 685322623 - 2¹³ = 685314431 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 (685322629) 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, 94086 + ... + 101107.

It is an arithmetic number, because the mean of its divisors is an integer number (171380332).

Almost surely, 2^685322623 is an apocalyptic number.

685322623 is a deficient number, since it is larger than the sum of its proper divisors (198705).

685322623 is a wasteful number, since it uses less digits than its factorization.

685322623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198704.

The product of its digits is 103680, while the sum is 37.

The square root of 685322623 is about 26178.6673266612. The cubic root of 685322623 is about 881.6543530897.

The spelling of 685322623 in words is "six hundred eighty-five million, three hundred twenty-two thousand, six hundred twenty-three".