128406293 has 2 divisors, whose sum is σ = 128406294. Its totient is φ = 128406292.

The previous prime is 128406283. The next prime is 128406319. The reversal of 128406293 is 392604821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93276964 + 35129329 = 9658^2 + 5927^2 .

It is a cyclic number.

It is not a de Polignac number, because 128406293 - 2¹⁴ = 128389909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128406203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64203146 + 64203147.

It is an arithmetic number, because the mean of its divisors is an integer number (64203147).

Almost surely, 2^128406293 is an apocalyptic number.

It is an amenable number.

128406293 is a deficient number, since it is larger than the sum of its proper divisors (1).

128406293 is an equidigital number, since it uses as much as digits as its factorization.

128406293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 128406293 is about 11331.6500563687. The cubic root of 128406293 is about 504.5010829174.

The spelling of 128406293 in words is "one hundred twenty-eight million, four hundred six thousand, two hundred ninety-three".