128926433 has 2 divisors, whose sum is σ = 128926434. Its totient is φ = 128926432.

The previous prime is 128926429. The next prime is 128926459. The reversal of 128926433 is 334629821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123832384 + 5094049 = 11128^2 + 2257^2 .

It is an emirp because it is prime and its reverse (334629821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128926433 - 2² = 128926429 is a prime.

It is a super-2 number, since 2×128926433² = 33244050252206978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128926403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64463216 + 64463217.

It is an arithmetic number, because the mean of its divisors is an integer number (64463217).

Almost surely, 2^128926433 is an apocalyptic number.

It is an amenable number.

128926433 is a deficient number, since it is larger than the sum of its proper divisors (1).

128926433 is an equidigital number, since it uses as much as digits as its factorization.

128926433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 128926433 is about 11354.5776231439. The cubic root of 128926433 is about 505.1813654354.

The spelling of 128926433 in words is "one hundred twenty-eight million, nine hundred twenty-six thousand, four hundred thirty-three".