128142899 has 2 divisors, whose sum is σ = 128142900. Its totient is φ = 128142898.

The previous prime is 128142893. The next prime is 128142901. The reversal of 128142899 is 998241821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128142899 - 2²⁰ = 127094323 is a prime.

Together with 128142901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128142893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64071449 + 64071450.

It is an arithmetic number, because the mean of its divisors is an integer number (64071450).

Almost surely, 2^128142899 is an apocalyptic number.

128142899 is a deficient number, since it is larger than the sum of its proper divisors (1).

128142899 is an equidigital number, since it uses as much as digits as its factorization.

128142899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 128142899 is about 11320.0220406146. The cubic root of 128142899 is about 504.1558933958.

The spelling of 128142899 in words is "one hundred twenty-eight million, one hundred forty-two thousand, eight hundred ninety-nine".