688882741 has 2 divisors, whose sum is σ = 688882742. Its totient is φ = 688882740.

The previous prime is 688882739. The next prime is 688882759. The reversal of 688882741 is 147288886.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682776900 + 6105841 = 26130^2 + 2471^2 .

It is a cyclic number.

It is not a de Polignac number, because 688882741 - 2¹ = 688882739 is a prime.

Together with 688882739, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688882771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344441370 + 344441371.

It is an arithmetic number, because the mean of its divisors is an integer number (344441371).

Almost surely, 2^688882741 is an apocalyptic number.

It is an amenable number.

688882741 is a deficient number, since it is larger than the sum of its proper divisors (1).

688882741 is an equidigital number, since it uses as much as digits as its factorization.

688882741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1376256, while the sum is 52.

The square root of 688882741 is about 26246.5757957110. The cubic root of 688882741 is about 883.1783915099.

The spelling of 688882741 in words is "six hundred eighty-eight million, eight hundred eighty-two thousand, seven hundred forty-one".