687331007999 has 4 divisors (see below), whose sum is σ = 687347551800. Its totient is φ = 687314464200.

The previous prime is 687331007939. The next prime is 687331008017. The reversal of 687331007999 is 999700133786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687331007999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687331007929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8209424 + ... + 8292725.

It is an arithmetic number, because the mean of its divisors is an integer number (171836887950).

Almost surely, 2^687331007999 is an apocalyptic number.

687331007999 is a deficient number, since it is larger than the sum of its proper divisors (16543801).

687331007999 is a wasteful number, since it uses less digits than its factorization.

687331007999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16543800.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 687331007999 in words is "six hundred eighty-seven billion, three hundred thirty-one million, seven thousand, nine hundred ninety-nine".