128295493 has 4 divisors (see below), whose sum is σ = 128645440. Its totient is φ = 127945548.

The previous prime is 128295487. The next prime is 128295521. The reversal of 128295493 is 394592821.

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 a cyclic number.

It is not a de Polignac number, because 128295493 - 2¹³ = 128287301 is a prime.

It is a super-2 number, since 2×128295493² = 32919467048226098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128295443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174423 + ... + 175156.

It is an arithmetic number, because the mean of its divisors is an integer number (32161360).

Almost surely, 2^128295493 is an apocalyptic number.

It is an amenable number.

128295493 is a deficient number, since it is larger than the sum of its proper divisors (349947).

128295493 is an equidigital number, since it uses as much as digits as its factorization.

128295493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349946.

The product of its digits is 155520, while the sum is 43.

The square root of 128295493 is about 11326.7600398349. The cubic root of 128295493 is about 504.3559321763.

The spelling of 128295493 in words is "one hundred twenty-eight million, two hundred ninety-five thousand, four hundred ninety-three".