128926297 has 4 divisors (see below), whose sum is σ = 128981556. Its totient is φ = 128871040.

The previous prime is 128926279. The next prime is 128926321. The reversal of 128926297 is 792629821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3575881 + 125350416 = 1891^2 + 11196^2 .

It is a cyclic number.

It is not a de Polignac number, because 128926297 - 2¹⁵ = 128893529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128926277) 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, 23968 + ... + 28849.

It is an arithmetic number, because the mean of its divisors is an integer number (32245389).

Almost surely, 2^128926297 is an apocalyptic number.

It is an amenable number.

128926297 is a deficient number, since it is larger than the sum of its proper divisors (55259).

128926297 is an equidigital number, since it uses as much as digits as its factorization.

128926297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55258.

The product of its digits is 217728, while the sum is 46.

The square root of 128926297 is about 11354.5716343682. The cubic root of 128926297 is about 505.1811878026.

The spelling of 128926297 in words is "one hundred twenty-eight million, nine hundred twenty-six thousand, two hundred ninety-seven".