685928099 has 4 divisors (see below), whose sum is σ = 686707560. Its totient is φ = 685148640.

The previous prime is 685928083. The next prime is 685928107. The reversal of 685928099 is 990829586.

685928099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 685928099 - 2⁴ = 685928083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685921099) 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, 388409 + ... + 390170.

It is an arithmetic number, because the mean of its divisors is an integer number (171676890).

Almost surely, 2^685928099 is an apocalyptic number.

685928099 is a deficient number, since it is larger than the sum of its proper divisors (779461).

685928099 is an equidigital number, since it uses as much as digits as its factorization.

685928099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779460.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The square root of 685928099 is about 26190.2290749814. The cubic root of 685928099 is about 881.9139210664.

The spelling of 685928099 in words is "six hundred eighty-five million, nine hundred twenty-eight thousand, ninety-nine".