687533764 has 12 divisors (see below), whose sum is σ = 1204317100. Its totient is φ = 343443168.

The previous prime is 687533713. The next prime is 687533767. The reversal of 687533764 is 467335786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 353740864 + 333792900 = 18808^2 + 18270^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (687533767) by changing a digit.

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, 76119 + ... + 84670.

Almost surely, 2^687533764 is an apocalyptic number.

It is an amenable number.

687533764 is a deficient number, since it is larger than the sum of its proper divisors (516783336).

687533764 is a wasteful number, since it uses less digits than its factorization.

687533764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161862 (or 161860 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 49.

The square root of 687533764 is about 26220.8650505661. The cubic root of 687533764 is about 882.6015319200.

The spelling of 687533764 in words is "six hundred eighty-seven million, five hundred thirty-three thousand, seven hundred sixty-four".