128299433243 has 4 divisors (see below), whose sum is σ = 128300652288. Its totient is φ = 128298214200.

The previous prime is 128299433209. The next prime is 128299433263. The reversal of 128299433243 is 342334992821.

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 128299433243 - 2⁶ = 128299433179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128299433191 and 128299433200.

It is not an unprimeable number, because it can be changed into a prime (128299433203) 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, 434996 + ... + 667697.

It is an arithmetic number, because the mean of its divisors is an integer number (32075163072).

Almost surely, 2^128299433243 is an apocalyptic number.

128299433243 is a deficient number, since it is larger than the sum of its proper divisors (1219045).

128299433243 is a wasteful number, since it uses less digits than its factorization.

128299433243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219044.

The product of its digits is 2239488, while the sum is 50.

The spelling of 128299433243 in words is "one hundred twenty-eight billion, two hundred ninety-nine million, four hundred thirty-three thousand, two hundred forty-three".