688798897847 has 2 divisors, whose sum is σ = 688798897848. Its totient is φ = 688798897846.

The previous prime is 688798897819. The next prime is 688798897921. The reversal of 688798897847 is 748798897886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688798897847 - 2¹² = 688798893751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688798897447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344399448923 + 344399448924.

It is an arithmetic number, because the mean of its divisors is an integer number (344399448924).

Almost surely, 2^688798897847 is an apocalyptic number.

688798897847 is a deficient number, since it is larger than the sum of its proper divisors (1).

688798897847 is an equidigital number, since it uses as much as digits as its factorization.

688798897847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21849440256, while the sum is 89.

The spelling of 688798897847 in words is "six hundred eighty-eight billion, seven hundred ninety-eight million, eight hundred ninety-seven thousand, eight hundred forty-seven".