128957473 has 8 divisors (see below), whose sum is σ = 132837056. Its totient is φ = 125118000.

The previous prime is 128957449. The next prime is 128957483. The reversal of 128957473 is 374759821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128957473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128957483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438 + ... + 16423.

It is an arithmetic number, because the mean of its divisors is an integer number (16604632).

Almost surely, 2^128957473 is an apocalyptic number.

It is an amenable number.

128957473 is a deficient number, since it is larger than the sum of its proper divisors (3879583).

128957473 is a wasteful number, since it uses less digits than its factorization.

128957473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its digits is 423360, while the sum is 46.

The square root of 128957473 is about 11355.9443904943. The cubic root of 128957473 is about 505.2219042423.

The spelling of 128957473 in words is "one hundred twenty-eight million, nine hundred fifty-seven thousand, four hundred seventy-three".