128370397 has 2 divisors, whose sum is σ = 128370398. Its totient is φ = 128370396.

The previous prime is 128370391. The next prime is 128370409. The reversal of 128370397 is 793073821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93489561 + 34880836 = 9669^2 + 5906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128370397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128370391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64185198 + 64185199.

It is an arithmetic number, because the mean of its divisors is an integer number (64185199).

Almost surely, 2^128370397 is an apocalyptic number.

It is an amenable number.

128370397 is a deficient number, since it is larger than the sum of its proper divisors (1).

128370397 is an equidigital number, since it uses as much as digits as its factorization.

128370397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 128370397 is about 11330.0660633555. The cubic root of 128370397 is about 504.4540674163.

The spelling of 128370397 in words is "one hundred twenty-eight million, three hundred seventy thousand, three hundred ninety-seven".