688138263259 has 2 divisors, whose sum is σ = 688138263260. Its totient is φ = 688138263258.

The previous prime is 688138263257. The next prime is 688138263271. The reversal of 688138263259 is 952362831886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688138263259 - 2¹ = 688138263257 is a prime.

It is a super-2 number, since 2×688138263259² (a number of 24 digits) contains 22 as substring.

Together with 688138263257, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 688138263197 and 688138263206.

It is not a weakly prime, because it can be changed into another prime (688138263257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344069131629 + 344069131630.

It is an arithmetic number, because the mean of its divisors is an integer number (344069131630).

Almost surely, 2^688138263259 is an apocalyptic number.

688138263259 is a deficient number, since it is larger than the sum of its proper divisors (1).

688138263259 is an equidigital number, since it uses as much as digits as its factorization.

688138263259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29859840, while the sum is 61.

The spelling of 688138263259 in words is "six hundred eighty-eight billion, one hundred thirty-eight million, two hundred sixty-three thousand, two hundred fifty-nine".