688392428567 has 4 divisors (see below), whose sum is σ = 691135028136. Its totient is φ = 685649829000.

The previous prime is 688392428543. The next prime is 688392428587. The reversal of 688392428567 is 765824293886.

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-688392428567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688392428497 and 688392428506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688392428587) 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, 1371299408 + ... + 1371299909.

It is an arithmetic number, because the mean of its divisors is an integer number (172783757034).

Almost surely, 2^688392428567 is an apocalyptic number.

688392428567 is a deficient number, since it is larger than the sum of its proper divisors (2742599569).

688392428567 is a wasteful number, since it uses less digits than its factorization.

688392428567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742599568.

The product of its digits is 278691840, while the sum is 68.

The spelling of 688392428567 in words is "six hundred eighty-eight billion, three hundred ninety-two million, four hundred twenty-eight thousand, five hundred sixty-seven".