687487156 has 6 divisors (see below), whose sum is σ = 1203102530. Its totient is φ = 343743576.

The previous prime is 687487153. The next prime is 687487159. The reversal of 687487156 is 651784786.

687487156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (687487153) and next prime (687487159).

It can be written as a sum of positive squares in only one way, i.e., 484880400 + 202606756 = 22020^2 + 14234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687487153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85935891 + ... + 85935898.

Almost surely, 2^687487156 is an apocalyptic number.

It is an amenable number.

687487156 is a deficient number, since it is larger than the sum of its proper divisors (515615374).

687487156 is a wasteful number, since it uses less digits than its factorization.

687487156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171871793 (or 171871791 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 52.

The square root of 687487156 is about 26219.9762776399. The cubic root of 687487156 is about 882.5815875798.

The spelling of 687487156 in words is "six hundred eighty-seven million, four hundred eighty-seven thousand, one hundred fifty-six".