128302849 has 2 divisors, whose sum is σ = 128302850. Its totient is φ = 128302848.

The previous prime is 128302847. The next prime is 128302871. The reversal of 128302849 is 948203821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123321025 + 4981824 = 11105^2 + 2232^2 .

It is a cyclic number.

It is not a de Polignac number, because 128302849 - 2¹ = 128302847 is a prime.

Together with 128302847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (128302843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64151424 + 64151425.

It is an arithmetic number, because the mean of its divisors is an integer number (64151425).

Almost surely, 2^128302849 is an apocalyptic number.

It is an amenable number.

128302849 is a deficient number, since it is larger than the sum of its proper divisors (1).

128302849 is an equidigital number, since it uses as much as digits as its factorization.

128302849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 128302849 is about 11327.0847529274. The cubic root of 128302849 is about 504.3655713077.

The spelling of 128302849 in words is "one hundred twenty-eight million, three hundred two thousand, eight hundred forty-nine".