128200423 has 4 divisors (see below), whose sum is σ = 138062008. Its totient is φ = 118338840.

The previous prime is 128200409. The next prime is 128200427. The reversal of 128200423 is 324002821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128200423 - 2¹³ = 128192231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128200394 and 128200403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128200427) 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, 4930773 + ... + 4930798.

It is an arithmetic number, because the mean of its divisors is an integer number (34515502).

Almost surely, 2^128200423 is an apocalyptic number.

128200423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128200423 is a deficient number, since it is larger than the sum of its proper divisors (9861585).

128200423 is an equidigital number, since it uses as much as digits as its factorization.

128200423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861584.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 128200423 is about 11322.5625633069. The cubic root of 128200423 is about 504.2313214929.

The spelling of 128200423 in words is "one hundred twenty-eight million, two hundred thousand, four hundred twenty-three".