687133748 has 12 divisors (see below), whose sum is σ = 1374267552. Its totient is φ = 294485880.

The previous prime is 687133723. The next prime is 687133757. The reversal of 687133748 is 847331786.

687133748 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12270218 + ... + 12270273.

It is an arithmetic number, because the mean of its divisors is an integer number (114522296).

Almost surely, 2^687133748 is an apocalyptic number.

It is an amenable number.

687133748 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687133748 is a wasteful number, since it uses less digits than its factorization.

687133748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24540502 (or 24540500 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 687133748 is about 26213.2361222341. The cubic root of 687133748 is about 882.4303290663.

The spelling of 687133748 in words is "six hundred eighty-seven million, one hundred thirty-three thousand, seven hundred forty-eight".