128346297 has 4 divisors (see below), whose sum is σ = 171128400. Its totient is φ = 85564196.

The previous prime is 128346289. The next prime is 128346313. The reversal of 128346297 is 792643821.

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 not a de Polignac number, because 128346297 - 2³ = 128346289 is a prime.

It is a super-2 number, since 2×128346297² = 32945543907224418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128346217) 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, 21391047 + ... + 21391052.

It is an arithmetic number, because the mean of its divisors is an integer number (42782100).

Almost surely, 2^128346297 is an apocalyptic number.

It is an amenable number.

128346297 is a deficient number, since it is larger than the sum of its proper divisors (42782103).

128346297 is an equidigital number, since it uses as much as digits as its factorization.

128346297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42782102.

The product of its digits is 145152, while the sum is 42.

The square root of 128346297 is about 11329.0024715330. The cubic root of 128346297 is about 504.4224970434.

The spelling of 128346297 in words is "one hundred twenty-eight million, three hundred forty-six thousand, two hundred ninety-seven".