128167999 has 2 divisors, whose sum is σ = 128168000. Its totient is φ = 128167998.

The previous prime is 128167987. The next prime is 128168011. The reversal of 128167999 is 999761821.

It is a balanced prime because it is at equal distance from previous prime (128167987) and next prime (128168011).

It is a cyclic number.

It is not a de Polignac number, because 128167999 - 2¹¹ = 128165951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128167969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64083999 + 64084000.

It is an arithmetic number, because the mean of its divisors is an integer number (64084000).

Almost surely, 2^128167999 is an apocalyptic number.

128167999 is a deficient number, since it is larger than the sum of its proper divisors (1).

128167999 is an equidigital number, since it uses as much as digits as its factorization.

128167999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 52.

The square root of 128167999 is about 11321.1306414156. The cubic root of 128167999 is about 504.1888084380.

The spelling of 128167999 in words is "one hundred twenty-eight million, one hundred sixty-seven thousand, nine hundred ninety-nine".