128803967 has 4 divisors (see below), whose sum is σ = 128966376. Its totient is φ = 128641560.

The previous prime is 128803957. The next prime is 128803973. The reversal of 128803967 is 769308821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769308821 = 73 ⋅10538477.

It is a cyclic number.

It is not a de Polignac number, because 128803967 - 2²⁴ = 112026751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128803957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80009 + ... + 81602.

It is an arithmetic number, because the mean of its divisors is an integer number (32241594).

Almost surely, 2^128803967 is an apocalyptic number.

128803967 is a deficient number, since it is larger than the sum of its proper divisors (162409).

128803967 is an equidigital number, since it uses as much as digits as its factorization.

128803967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162408.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 128803967 is about 11349.1835389159. The cubic root of 128803967 is about 505.0213590940.

The spelling of 128803967 in words is "one hundred twenty-eight million, eight hundred three thousand, nine hundred sixty-seven".