687748892 has 12 divisors (see below), whose sum is σ = 1223291496. Its totient is φ = 338237040.

The previous prime is 687748879. The next prime is 687748951. The reversal of 687748892 is 298847786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409078 + ... + 1409565.

It is an arithmetic number, because the mean of its divisors is an integer number (101940958).

Almost surely, 2^687748892 is an apocalyptic number.

It is an amenable number.

687748892 is a deficient number, since it is larger than the sum of its proper divisors (535542604).

687748892 is a wasteful number, since it uses less digits than its factorization.

687748892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818708 (or 2818706 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 59.

The square root of 687748892 is about 26224.9669589878. The cubic root of 687748892 is about 882.6935770976.

The spelling of 687748892 in words is "six hundred eighty-seven million, seven hundred forty-eight thousand, eight hundred ninety-two".