128674417 has 2 divisors, whose sum is σ = 128674418. Its totient is φ = 128674416.

The previous prime is 128674409. The next prime is 128674423. The reversal of 128674417 is 714476821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 2359296 = 11239^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 128674417 - 2³ = 128674409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128674417.

It is not a weakly prime, because it can be changed into another prime (128374417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64337208 + 64337209.

It is an arithmetic number, because the mean of its divisors is an integer number (64337209).

Almost surely, 2^128674417 is an apocalyptic number.

It is an amenable number.

128674417 is a deficient number, since it is larger than the sum of its proper divisors (1).

128674417 is an equidigital number, since it uses as much as digits as its factorization.

128674417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The square root of 128674417 is about 11343.4746440410. The cubic root of 128674417 is about 504.8519868154.

The spelling of 128674417 in words is "one hundred twenty-eight million, six hundred seventy-four thousand, four hundred seventeen".