128860349 has 4 divisors (see below), whose sum is σ = 128883264. Its totient is φ = 128837436.

The previous prime is 128860343. The next prime is 128860351. The reversal of 128860349 is 943068821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 943068821 = 2069 ⋅455809.

It is a cyclic number.

It is not a de Polignac number, because 128860349 - 2⁸ = 128860093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128860343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404 + ... + 16410.

It is an arithmetic number, because the mean of its divisors is an integer number (32220816).

Almost surely, 2^128860349 is an apocalyptic number.

It is an amenable number.

128860349 is a deficient number, since it is larger than the sum of its proper divisors (22915).

128860349 is an equidigital number, since it uses as much as digits as its factorization.

128860349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22914.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 128860349 is about 11351.6672343758. The cubic root of 128860349 is about 505.0950368469.

The spelling of 128860349 in words is "one hundred twenty-eight million, eight hundred sixty thousand, three hundred forty-nine".