688849226279 has 2 divisors, whose sum is σ = 688849226280. Its totient is φ = 688849226278.

The previous prime is 688849226243. The next prime is 688849226293. The reversal of 688849226279 is 972622948886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688849226279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688849826279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344424613139 + 344424613140.

It is an arithmetic number, because the mean of its divisors is an integer number (344424613140).

Almost surely, 2^688849226279 is an apocalyptic number.

688849226279 is a deficient number, since it is larger than the sum of its proper divisors (1).

688849226279 is an equidigital number, since it uses as much as digits as its factorization.

688849226279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 334430208, while the sum is 71.

The spelling of 688849226279 in words is "six hundred eighty-eight billion, eight hundred forty-nine million, two hundred twenty-six thousand, two hundred seventy-nine".