687987962 has 8 divisors (see below), whose sum is σ = 1042199892. Its totient is φ = 340588000.

The previous prime is 687987907. The next prime is 687987997. The reversal of 687987962 is 269789786.

It is a happy number.

687987962 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 641051761 + 46936201 = 25319^2 + 6851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 687987895 and 687987904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702739 + ... + 1703142.

Almost surely, 2^687987962 is an apocalyptic number.

687987962 is a deficient number, since it is larger than the sum of its proper divisors (354211930).

687987962 is a wasteful number, since it uses less digits than its factorization.

687987962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405984.

The product of its digits is 18289152, while the sum is 62.

The square root of 687987962 is about 26229.5246239805. The cubic root of 687987962 is about 882.7958436414.

The spelling of 687987962 in words is "six hundred eighty-seven million, nine hundred eighty-seven thousand, nine hundred sixty-two".