128764023 has 4 divisors (see below), whose sum is σ = 171685368. Its totient is φ = 85842680.

The previous prime is 128763997. The next prime is 128764037. The reversal of 128764023 is 320467821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320467821 = 3 ⋅106822607.

It is a cyclic number.

It is not a de Polignac number, because 128764023 - 2⁹ = 128763511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128764063) 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, 21460668 + ... + 21460673.

It is an arithmetic number, because the mean of its divisors is an integer number (42921342).

Almost surely, 2^128764023 is an apocalyptic number.

128764023 is a deficient number, since it is larger than the sum of its proper divisors (42921345).

128764023 is an equidigital number, since it uses as much as digits as its factorization.

128764023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42921344.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 128764023 is about 11347.4236282955. The cubic root of 128764023 is about 504.9691488522.

The spelling of 128764023 in words is "one hundred twenty-eight million, seven hundred sixty-four thousand, twenty-three".