685560898 has 8 divisors (see below), whose sum is σ = 1121826960. Its totient is φ = 311618580.

The previous prime is 685560881. The next prime is 685560929. The reversal of 685560898 is 898065586.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15580908 + ... + 15580951.

It is an arithmetic number, because the mean of its divisors is an integer number (140228370).

Almost surely, 2^685560898 is an apocalyptic number.

685560898 is a deficient number, since it is larger than the sum of its proper divisors (436266062).

685560898 is a wasteful number, since it uses less digits than its factorization.

685560898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31161872.

The product of its (nonzero) digits is 4147200, while the sum is 55.

The square root of 685560898 is about 26183.2178694675. The cubic root of 685560898 is about 881.7565199826.

The spelling of 685560898 in words is "six hundred eighty-five million, five hundred sixty thousand, eight hundred ninety-eight".