688214380489 has 4 divisors (see below), whose sum is σ = 688304127940. Its totient is φ = 688124633040.

The previous prime is 688214380463. The next prime is 688214380493. The reversal of 688214380489 is 984083412886.

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

It can be written as a sum of positive squares in 2 ways, for example, as 523141191225 + 165073189264 = 723285^2 + 406292^2 .

It is a cyclic number.

It is not a de Polignac number, because 688214380489 - 2¹¹ = 688214378441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688214380429) 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, 44862222 + ... + 44877559.

It is an arithmetic number, because the mean of its divisors is an integer number (172076031985).

Almost surely, 2^688214380489 is an apocalyptic number.

It is an amenable number.

688214380489 is a deficient number, since it is larger than the sum of its proper divisors (89747451).

688214380489 is an equidigital number, since it uses as much as digits as its factorization.

688214380489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89747450.

The product of its (nonzero) digits is 21233664, while the sum is 61.

The spelling of 688214380489 in words is "six hundred eighty-eight billion, two hundred fourteen million, three hundred eighty thousand, four hundred eighty-nine".