687903212 has 6 divisors (see below), whose sum is σ = 1203830628. Its totient is φ = 343951604.

The previous prime is 687903211. The next prime is 687903241. The reversal of 687903212 is 212309786.

It is not an unprimeable number, because it can be changed into a prime (687903211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85987898 + ... + 85987905.

It is an arithmetic number, because the mean of its divisors is an integer number (200638438).

Almost surely, 2^687903212 is an apocalyptic number.

It is an amenable number.

687903212 is a deficient number, since it is larger than the sum of its proper divisors (515927416).

687903212 is a wasteful number, since it uses less digits than its factorization.

687903212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171975807 (or 171975805 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 687903212 is about 26227.9090283614. The cubic root of 687903212 is about 882.7595929974.

The spelling of 687903212 in words is "six hundred eighty-seven million, nine hundred three thousand, two hundred twelve".