688679882999 has 4 divisors (see below), whose sum is σ = 688718850960. Its totient is φ = 688640915040.

The previous prime is 688679882963. The next prime is 688679883011. The reversal of 688679882999 is 999288976886.

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-688679882999 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 (688679882909) 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, 19457459 + ... + 19492820.

It is an arithmetic number, because the mean of its divisors is an integer number (172179712740).

Almost surely, 2^688679882999 is an apocalyptic number.

688679882999 is a deficient number, since it is larger than the sum of its proper divisors (38967961).

688679882999 is a wasteful number, since it uses less digits than its factorization.

688679882999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38967960.

The product of its digits is 13544423424, while the sum is 89.

The spelling of 688679882999 in words is "six hundred eighty-eight billion, six hundred seventy-nine million, eight hundred eighty-two thousand, nine hundred ninety-nine".