128913445 has 8 divisors (see below), whose sum is σ = 154791936. Its totient is φ = 103066896.

The previous prime is 128913419. The next prime is 128913457. The reversal of 128913445 is 544319821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128913445 - 2⁹ = 128912933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044 + ... + 16186.

It is an arithmetic number, because the mean of its divisors is an integer number (19348992).

Almost surely, 2^128913445 is an apocalyptic number.

It is an amenable number.

128913445 is a deficient number, since it is larger than the sum of its proper divisors (25878491).

128913445 is a wasteful number, since it uses less digits than its factorization.

128913445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15971.

The product of its digits is 34560, while the sum is 37.

The square root of 128913445 is about 11354.0056808159. The cubic root of 128913445 is about 505.1644009393.

The spelling of 128913445 in words is "one hundred twenty-eight million, nine hundred thirteen thousand, four hundred forty-five".