128330407 has 2 divisors, whose sum is σ = 128330408. Its totient is φ = 128330406.

The previous prime is 128330381. The next prime is 128330459. The reversal of 128330407 is 704033821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128330407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128330507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64165203 + 64165204.

It is an arithmetic number, because the mean of its divisors is an integer number (64165204).

Almost surely, 2^128330407 is an apocalyptic number.

128330407 is a deficient number, since it is larger than the sum of its proper divisors (1).

128330407 is an equidigital number, since it uses as much as digits as its factorization.

128330407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 128330407 is about 11328.3011524235. The cubic root of 128330407 is about 504.4016793949.

The spelling of 128330407 in words is "one hundred twenty-eight million, three hundred thirty thousand, four hundred seven".