128552973 has 8 divisors (see below), whose sum is σ = 173469408. Its totient is φ = 84669264.

The previous prime is 128552959. The next prime is 128552989. The reversal of 128552973 is 379255821.

It is a happy number.

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

It is not a de Polignac number, because 128552973 - 2²² = 124358669 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128552923) 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, 257890 + ... + 258387.

It is an arithmetic number, because the mean of its divisors is an integer number (21683676).

Almost surely, 2^128552973 is an apocalyptic number.

It is an amenable number.

128552973 is a deficient number, since it is larger than the sum of its proper divisors (44916435).

128552973 is an equidigital number, since it uses as much as digits as its factorization.

128552973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516363.

The product of its digits is 151200, while the sum is 42.

The square root of 128552973 is about 11338.1203468653. The cubic root of 128552973 is about 504.6931089671.

The spelling of 128552973 in words is "one hundred twenty-eight million, five hundred fifty-two thousand, nine hundred seventy-three".