686941876 has 6 divisors (see below), whose sum is σ = 1202148290. Its totient is φ = 343470936.

The previous prime is 686941867. The next prime is 686941877. The reversal of 686941876 is 678149686.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 656691876 + 30250000 = 25626^2 + 5500^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686941877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85867731 + ... + 85867738.

Almost surely, 2^686941876 is an apocalyptic number.

It is an amenable number.

686941876 is a deficient number, since it is larger than the sum of its proper divisors (515206414).

686941876 is a wasteful number, since it uses less digits than its factorization.

686941876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171735473 (or 171735471 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 686941876 is about 26209.5760362506. The cubic root of 686941876 is about 882.3481861868.

The spelling of 686941876 in words is "six hundred eighty-six million, nine hundred forty-one thousand, eight hundred seventy-six".