128334997 has 4 divisors (see below), whose sum is σ = 146668576. Its totient is φ = 110001420.

The previous prime is 128334979. The next prime is 128335007. The reversal of 128334997 is 799433821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128334997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128334937) 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, 9166779 + ... + 9166792.

It is an arithmetic number, because the mean of its divisors is an integer number (36667144).

Almost surely, 2^128334997 is an apocalyptic number.

It is an amenable number.

128334997 is a deficient number, since it is larger than the sum of its proper divisors (18333579).

128334997 is an equidigital number, since it uses as much as digits as its factorization.

128334997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333578.

The product of its digits is 326592, while the sum is 46.

The square root of 128334997 is about 11328.5037405652. The cubic root of 128334997 is about 504.4076929765.

The spelling of 128334997 in words is "one hundred twenty-eight million, three hundred thirty-four thousand, nine hundred ninety-seven".