128365473 has 4 divisors (see below), whose sum is σ = 171153968. Its totient is φ = 85576980.

The previous prime is 128365423. The next prime is 128365477. The reversal of 128365473 is 374563821.

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.

It is not a de Polignac number, because 128365473 - 2⁸ = 128365217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128365477) 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, 21394243 + ... + 21394248.

It is an arithmetic number, because the mean of its divisors is an integer number (42788492).

Almost surely, 2^128365473 is an apocalyptic number.

It is an amenable number.

128365473 is a deficient number, since it is larger than the sum of its proper divisors (42788495).

128365473 is an equidigital number, since it uses as much as digits as its factorization.

128365473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42788494.

The product of its digits is 120960, while the sum is 39.

The square root of 128365473 is about 11329.8487633331. The cubic root of 128365473 is about 504.4476174256.

The spelling of 128365473 in words is "one hundred twenty-eight million, three hundred sixty-five thousand, four hundred seventy-three".