687573632 has 16 divisors (see below), whose sum is σ = 1369775850. Its totient is φ = 343786752.

The previous prime is 687573629. The next prime is 687573643. The reversal of 687573632 is 236375786.

It can be written as a sum of positive squares in only one way, i.e., 490002496 + 197571136 = 22136^2 + 14056^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2685707 + ... + 2685962.

Almost surely, 2^687573632 is an apocalyptic number.

It is an amenable number.

687573632 is a deficient number, since it is larger than the sum of its proper divisors (682202218).

687573632 is an equidigital number, since it uses as much as digits as its factorization.

687573632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371683 (or 5371671 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 687573632 is about 26221.6252738079. The cubic root of 687573632 is about 882.6185913865.

The spelling of 687573632 in words is "six hundred eighty-seven million, five hundred seventy-three thousand, six hundred thirty-two".