128108473 has 4 divisors (see below), whose sum is σ = 130525668. Its totient is φ = 125691280.

The previous prime is 128108429. The next prime is 128108483. The reversal of 128108473 is 374801821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374801821 = 4261 ⋅87961.

It can be written as a sum of positive squares in 2 ways, for example, as 112529664 + 15578809 = 10608^2 + 3947^2 .

It is a cyclic number.

It is not a de Polignac number, because 128108473 - 2¹⁷ = 127977401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128108483) 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, 1208518 + ... + 1208623.

It is an arithmetic number, because the mean of its divisors is an integer number (32631417).

Almost surely, 2^128108473 is an apocalyptic number.

It is an amenable number.

128108473 is a deficient number, since it is larger than the sum of its proper divisors (2417195).

128108473 is an equidigital number, since it uses as much as digits as its factorization.

128108473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417194.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 128108473 is about 11318.5013583955. The cubic root of 128108473 is about 504.1107416539.

The spelling of 128108473 in words is "one hundred twenty-eight million, one hundred eight thousand, four hundred seventy-three".