688721264141231 has 2 divisors, whose sum is σ = 688721264141232. Its totient is φ = 688721264141230.

The previous prime is 688721264141203. The next prime is 688721264141299. The reversal of 688721264141231 is 132141462127886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688721264141231 - 2²⁶ = 688721197032367 is a prime.

It is a super-2 number, since 2×688721264141231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688721269141231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344360632070615 + 344360632070616.

It is an arithmetic number, because the mean of its divisors is an integer number (344360632070616).

Almost surely, 2^{688721264141231} is an apocalyptic number.

688721264141231 is a deficient number, since it is larger than the sum of its proper divisors (1).

688721264141231 is an equidigital number, since it uses as much as digits as its factorization.

688721264141231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6193152, while the sum is 56.

The spelling of 688721264141231 in words is "six hundred eighty-eight trillion, seven hundred twenty-one billion, two hundred sixty-four million, one hundred forty-one thousand, two hundred thirty-one".