687239675 has 6 divisors (see below), whose sum is σ = 852177228. Its totient is φ = 549791720.

The previous prime is 687239669. The next prime is 687239677. The reversal of 687239675 is 576932786.

It is a de Polignac number, because none of the positive numbers 2^k-687239675 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687239677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13744769 + ... + 13744818.

It is an arithmetic number, because the mean of its divisors is an integer number (142029538).

Almost surely, 2^687239675 is an apocalyptic number.

687239675 is a deficient number, since it is larger than the sum of its proper divisors (164937553).

687239675 is a wasteful number, since it uses less digits than its factorization.

687239675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27489597 (or 27489592 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 53.

The square root of 687239675 is about 26215.2565312644. The cubic root of 687239675 is about 882.4756712310.

The spelling of 687239675 in words is "six hundred eighty-seven million, two hundred thirty-nine thousand, six hundred seventy-five".