128833997 has 8 divisors (see below), whose sum is σ = 131025600. Its totient is φ = 126659104.

The previous prime is 128833961. The next prime is 128834009. The reversal of 128833997 is 799338821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128833997 - 2⁶ = 128833933 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 (128833907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11888 + ... + 19974.

It is an arithmetic number, because the mean of its divisors is an integer number (16378200).

Almost surely, 2^128833997 is an apocalyptic number.

It is an amenable number.

128833997 is a deficient number, since it is larger than the sum of its proper divisors (2191603).

128833997 is an equidigital number, since it uses as much as digits as its factorization.

128833997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355.

The product of its digits is 653184, while the sum is 50.

The square root of 128833997 is about 11350.5064644711. The cubic root of 128833997 is about 505.0606037780.

The spelling of 128833997 in words is "one hundred twenty-eight million, eight hundred thirty-three thousand, nine hundred ninety-seven".