685948798 has 4 divisors (see below), whose sum is σ = 1028923200. Its totient is φ = 342974398.

The previous prime is 685948741. The next prime is 685948817. The reversal of 685948798 is 897849586.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171487198 + ... + 171487201.

It is an arithmetic number, because the mean of its divisors is an integer number (257230800).

Almost surely, 2^685948798 is an apocalyptic number.

685948798 is a deficient number, since it is larger than the sum of its proper divisors (342974402).

685948798 is a wasteful number, since it uses less digits than its factorization.

685948798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342974401.

The product of its digits is 34836480, while the sum is 64.

The square root of 685948798 is about 26190.6242384560. The cubic root of 685948798 is about 881.9227920412.

The spelling of 685948798 in words is "six hundred eighty-five million, nine hundred forty-eight thousand, seven hundred ninety-eight".