128023169 has 4 divisors (see below), whose sum is σ = 131000496. Its totient is φ = 125045844.

The previous prime is 128023163. The next prime is 128023177. The reversal of 128023169 is 961320821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 961320821 = 4783 ⋅200987.

It is a cyclic number.

It is not a de Polignac number, because 128023169 - 2²⁰ = 126974593 is a prime.

It is a super-2 number, since 2×128023169² = 32779863601605122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128023163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488599 + ... + 1488684.

It is an arithmetic number, because the mean of its divisors is an integer number (32750124).

Almost surely, 2^128023169 is an apocalyptic number.

It is an amenable number.

128023169 is a deficient number, since it is larger than the sum of its proper divisors (2977327).

128023169 is an equidigital number, since it uses as much as digits as its factorization.

128023169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977326.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 128023169 is about 11314.7323874672. The cubic root of 128023169 is about 503.9988255306.

The spelling of 128023169 in words is "one hundred twenty-eight million, twenty-three thousand, one hundred sixty-nine".