128433139 has 2 divisors, whose sum is σ = 128433140. Its totient is φ = 128433138.

The previous prime is 128433089. The next prime is 128433163. The reversal of 128433139 is 931334821.

It is a strong prime.

It is an emirp because it is prime and its reverse (931334821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128433139 - 2⁹ = 128432627 is a prime.

It is not a weakly prime, because it can be changed into another prime (128431139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64216569 + 64216570.

It is an arithmetic number, because the mean of its divisors is an integer number (64216570).

Almost surely, 2^128433139 is an apocalyptic number.

128433139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128433139 is an equidigital number, since it uses as much as digits as its factorization.

128433139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 128433139 is about 11332.8345527498. The cubic root of 128433139 is about 504.5362392741.

The spelling of 128433139 in words is "one hundred twenty-eight million, four hundred thirty-three thousand, one hundred thirty-nine".