128350553 has 4 divisors (see below), whose sum is σ = 128560548. Its totient is φ = 128140560.

The previous prime is 128350517. The next prime is 128350559. The reversal of 128350553 is 355053821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355053821 = 401 ⋅885421.

It can be written as a sum of positive squares in 2 ways, for example, as 28590409 + 99760144 = 5347^2 + 9988^2 .

It is a cyclic number.

It is not a de Polignac number, because 128350553 - 2⁶ = 128350489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128350559) 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, 104078 + ... + 105303.

It is an arithmetic number, because the mean of its divisors is an integer number (32140137).

Almost surely, 2^128350553 is an apocalyptic number.

It is an amenable number.

128350553 is a deficient number, since it is larger than the sum of its proper divisors (209995).

128350553 is an equidigital number, since it uses as much as digits as its factorization.

128350553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209994.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 128350553 is about 11329.1903064606. The cubic root of 128350553 is about 504.4280725799.

The spelling of 128350553 in words is "one hundred twenty-eight million, three hundred fifty thousand, five hundred fifty-three".