687163448 has 8 divisors (see below), whose sum is σ = 1288431480. Its totient is φ = 343581720.

The previous prime is 687163447. The next prime is 687163471. The reversal of 687163448 is 844361786.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687163447) by changing a digit.

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, 42947708 + ... + 42947723.

It is an arithmetic number, because the mean of its divisors is an integer number (161053935).

Almost surely, 2^687163448 is an apocalyptic number.

It is an amenable number.

687163448 is a deficient number, since it is larger than the sum of its proper divisors (601268032).

687163448 is a wasteful number, since it uses less digits than its factorization.

687163448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85895437 (or 85895433 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 687163448 is about 26213.8026238087. The cubic root of 687163448 is about 882.4430426529.

The spelling of 687163448 in words is "six hundred eighty-seven million, one hundred sixty-three thousand, four hundred forty-eight".