128670473 has 2 divisors, whose sum is σ = 128670474. Its totient is φ = 128670472.

The previous prime is 128670439. The next prime is 128670499. The reversal of 128670473 is 374076821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128074489 + 595984 = 11317^2 + 772^2 .

It is an emirp because it is prime and its reverse (374076821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128670473 - 2¹⁰ = 128669449 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 (128630473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64335236 + 64335237.

It is an arithmetic number, because the mean of its divisors is an integer number (64335237).

Almost surely, 2^128670473 is an apocalyptic number.

It is an amenable number.

128670473 is a deficient number, since it is larger than the sum of its proper divisors (1).

128670473 is an equidigital number, since it uses as much as digits as its factorization.

128670473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 128670473 is about 11343.3007982686. The cubic root of 128670473 is about 504.8468286893.

The spelling of 128670473 in words is "one hundred twenty-eight million, six hundred seventy thousand, four hundred seventy-three".