128173349 has 2 divisors, whose sum is σ = 128173350. Its totient is φ = 128173348.

The previous prime is 128173337. The next prime is 128173379. The reversal of 128173349 is 943371821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 10125124 = 10865^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 128173349 - 2⁴ = 128173333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128173379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64086674 + 64086675.

It is an arithmetic number, because the mean of its divisors is an integer number (64086675).

Almost surely, 2^128173349 is an apocalyptic number.

It is an amenable number.

128173349 is a deficient number, since it is larger than the sum of its proper divisors (1).

128173349 is an equidigital number, since it uses as much as digits as its factorization.

128173349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 128173349 is about 11321.3669227704. The cubic root of 128173349 is about 504.1958236384.

The spelling of 128173349 in words is "one hundred twenty-eight million, one hundred seventy-three thousand, three hundred forty-nine".