128603873 has 2 divisors, whose sum is σ = 128603874. Its totient is φ = 128603872.

The previous prime is 128603809. The next prime is 128603911. The reversal of 128603873 is 378306821.

It is a happy number.

It is an a-pointer prime, because the next prime (128603911) can be obtained adding 128603873 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71707024 + 56896849 = 8468^2 + 7543^2 .

It is a cyclic number.

It is not a de Polignac number, because 128603873 - 2⁶ = 128603809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (128603173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64301936 + 64301937.

It is an arithmetic number, because the mean of its divisors is an integer number (64301937).

Almost surely, 2^128603873 is an apocalyptic number.

It is an amenable number.

128603873 is a deficient number, since it is larger than the sum of its proper divisors (1).

128603873 is an equidigital number, since it uses as much as digits as its factorization.

128603873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 128603873 is about 11340.3647648566. The cubic root of 128603873 is about 504.7597105372.

The spelling of 128603873 in words is "one hundred twenty-eight million, six hundred three thousand, eight hundred seventy-three".