128199759 has 8 divisors (see below), whose sum is σ = 172695600. Its totient is φ = 84585216.

The previous prime is 128199733. The next prime is 128199761. The reversal of 128199759 is 957991821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128199759 - 2¹⁵ = 128166991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128192759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219984 + ... + 220565.

It is an arithmetic number, because the mean of its divisors is an integer number (21586950).

Almost surely, 2^128199759 is an apocalyptic number.

128199759 is a deficient number, since it is larger than the sum of its proper divisors (44495841).

128199759 is an equidigital number, since it uses as much as digits as its factorization.

128199759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440649.

The product of its digits is 408240, while the sum is 51.

The square root of 128199759 is about 11322.5332412848. The cubic root of 128199759 is about 504.2304509545.

It can be divided in two parts, 12819 and 9759, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 128199759 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, seven hundred fifty-nine".