788888883821 has 2 divisors, whose sum is σ = 788888883822. Its totient is φ = 788888883820.

The previous prime is 788888883817. The next prime is 788888883883. The reversal of 788888883821 is 128388888887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788419684900 + 469198921 = 887930^2 + 21661^2 .

It is a cyclic number.

It is not a de Polignac number, because 788888883821 - 2² = 788888883817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788882883821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394444441910 + 394444441911.

It is an arithmetic number, because the mean of its divisors is an integer number (394444441911).

Almost surely, 2^788888883821 is an apocalyptic number.

It is an amenable number.

788888883821 is a deficient number, since it is larger than the sum of its proper divisors (1).

788888883821 is an equidigital number, since it uses as much as digits as its factorization.

788888883821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 704643072, while the sum is 77.

The spelling of 788888883821 in words is "seven hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-three thousand, eight hundred twenty-one".