128506373 has 2 divisors, whose sum is σ = 128506374. Its totient is φ = 128506372.

The previous prime is 128506369. The next prime is 128506387. The reversal of 128506373 is 373605821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83576164 + 44930209 = 9142^2 + 6703^2 .

It is a cyclic number.

It is not a de Polignac number, because 128506373 - 2² = 128506369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128506363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64253186 + 64253187.

It is an arithmetic number, because the mean of its divisors is an integer number (64253187).

Almost surely, 2^128506373 is an apocalyptic number.

It is an amenable number.

128506373 is a deficient number, since it is larger than the sum of its proper divisors (1).

128506373 is an equidigital number, since it uses as much as digits as its factorization.

128506373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 128506373 is about 11336.0651462489. The cubic root of 128506373 is about 504.6321184387.

The spelling of 128506373 in words is "one hundred twenty-eight million, five hundred six thousand, three hundred seventy-three".