685756252 has 6 divisors (see below), whose sum is σ = 1200073448. Its totient is φ = 342878124.

The previous prime is 685756231. The next prime is 685756289. The reversal of 685756252 is 252657586.

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, 85719528 + ... + 85719535.

Almost surely, 2^685756252 is an apocalyptic number.

It is an amenable number.

685756252 is a deficient number, since it is larger than the sum of its proper divisors (514317196).

685756252 is a wasteful number, since it uses less digits than its factorization.

685756252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171439067 (or 171439065 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 685756252 is about 26186.9481230631. The cubic root of 685756252 is about 881.8402656692.

The spelling of 685756252 in words is "six hundred eighty-five million, seven hundred fifty-six thousand, two hundred fifty-two".