788888109389 has 2 divisors, whose sum is σ = 788888109390. Its totient is φ = 788888109388.

The previous prime is 788888109353. The next prime is 788888109397. The reversal of 788888109389 is 983901888887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758632290025 + 30255819364 = 870995^2 + 173942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-788888109389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788888109329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394444054694 + 394444054695.

It is an arithmetic number, because the mean of its divisors is an integer number (394444054695).

Almost surely, 2^788888109389 is an apocalyptic number.

It is an amenable number.

788888109389 is a deficient number, since it is larger than the sum of its proper divisors (1).

788888109389 is an equidigital number, since it uses as much as digits as its factorization.

788888109389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 445906944, while the sum is 77.

The spelling of 788888109389 in words is "seven hundred eighty-eight billion, eight hundred eighty-eight million, one hundred nine thousand, three hundred eighty-nine".