685199950 has 12 divisors (see below), whose sum is σ = 1274472000. Its totient is φ = 274079960.

The previous prime is 685199939. The next prime is 685199951. The reversal of 685199950 is 59991586.

685199950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685199951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6851950 + ... + 6852049.

It is an arithmetic number, because the mean of its divisors is an integer number (106206000).

Almost surely, 2^685199950 is an apocalyptic number.

685199950 is a deficient number, since it is larger than the sum of its proper divisors (589272050).

685199950 is a wasteful number, since it uses less digits than its factorization.

685199950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704011 (or 13704006 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 685199950 is about 26176.3242262927. The cubic root of 685199950 is about 881.6017444668.

The spelling of 685199950 in words is "six hundred eighty-five million, one hundred ninety-nine thousand, nine hundred fifty".