685005923 has 8 divisors (see below), whose sum is σ = 794548992. Its totient is φ = 578384136.

The previous prime is 685005911. The next prime is 685005931. The reversal of 685005923 is 329500586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685005923 - 2⁶ = 685005859 is a prime.

It is a super-2 number, since 2×685005923² = 938466229090163858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685005023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729815 + ... + 730752.

It is an arithmetic number, because the mean of its divisors is an integer number (99318624).

Almost surely, 2^685005923 is an apocalyptic number.

685005923 is a deficient number, since it is larger than the sum of its proper divisors (109543069).

685005923 is a wasteful number, since it uses less digits than its factorization.

685005923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460641.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 685005923 is about 26172.6178094588. The cubic root of 685005923 is about 881.5185226812.

The spelling of 685005923 in words is "six hundred eighty-five million, five thousand, nine hundred twenty-three".