685703899 has 8 divisors (see below), whose sum is σ = 715923360. Its totient is φ = 655518336.

The previous prime is 685703881. The next prime is 685703917. The reversal of 685703899 is 998307586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (685703881) and next prime (685703917).

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 685703899 - 2²³ = 677315291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685703299) 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, 38467 + ... + 53395.

It is an arithmetic number, because the mean of its divisors is an integer number (89490420).

Almost surely, 2^685703899 is an apocalyptic number.

685703899 is a deficient number, since it is larger than the sum of its proper divisors (30219461).

685703899 is a wasteful number, since it uses less digits than its factorization.

685703899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 685703899 is about 26185.9485029662. The cubic root of 685703899 is about 881.8178241879.

The spelling of 685703899 in words is "six hundred eighty-five million, seven hundred three thousand, eight hundred ninety-nine".