685895902 has 4 divisors (see below), whose sum is σ = 1028843856. Its totient is φ = 342947950.

The previous prime is 685895897. The next prime is 685895911. The reversal of 685895902 is 209598586.

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

It is a self number, because there is not a number n which added to its sum of digits gives 685895902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171473974 + ... + 171473977.

It is an arithmetic number, because the mean of its divisors is an integer number (257210964).

Almost surely, 2^685895902 is an apocalyptic number.

685895902 is a deficient number, since it is larger than the sum of its proper divisors (342947954).

685895902 is a wasteful number, since it uses less digits than its factorization.

685895902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342947953.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The square root of 685895902 is about 26189.6143919684. The cubic root of 685895902 is about 881.9001220366.

The spelling of 685895902 in words is "six hundred eighty-five million, eight hundred ninety-five thousand, nine hundred two".