128347 has 2 divisors, whose sum is σ = 128348. Its totient is φ = 128346.

The previous prime is 128341. The next prime is 128351. The reversal of 128347 is 743821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128347 - 2³ = 128339 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁵ + 3⁸ + 8 + 4⁶ + 7⁶ .

It is not a weakly prime, because it can be changed into another prime (128341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64173 + 64174.

It is an arithmetic number, because the mean of its divisors is an integer number (64174).

2¹²⁸³⁴⁷ is an apocalyptic number.

128347 is a deficient number, since it is larger than the sum of its proper divisors (1).

128347 is an equidigital number, since it uses as much as digits as its factorization.

128347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 128347 is about 358.2554954219. The cubic root of 128347 is about 50.4423418011.

The spelling of 128347 in words is "one hundred twenty-eight thousand, three hundred forty-seven".