128068819 has 2 divisors, whose sum is σ = 128068820. Its totient is φ = 128068818.

The previous prime is 128068783. The next prime is 128068847. The reversal of 128068819 is 918860821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128068819 - 2⁹ = 128068307 is a prime.

It is a super-2 number, since 2×128068819² = 32803244800109522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128068859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64034409 + 64034410.

It is an arithmetic number, because the mean of its divisors is an integer number (64034410).

Almost surely, 2^128068819 is an apocalyptic number.

128068819 is a deficient number, since it is larger than the sum of its proper divisors (1).

128068819 is an equidigital number, since it uses as much as digits as its factorization.

128068819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 128068819 is about 11316.7494891422. The cubic root of 128068819 is about 504.0587230540.

The spelling of 128068819 in words is "one hundred twenty-eight million, sixty-eight thousand, eight hundred nineteen".