128849453 has 4 divisors (see below), whose sum is σ = 130614588. Its totient is φ = 127084320.

The previous prime is 128849417. The next prime is 128849521. The reversal of 128849453 is 354948821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79245604 + 49603849 = 8902^2 + 7043^2 .

It is a cyclic number.

It is not a de Polignac number, because 128849453 - 2¹² = 128845357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128849053) 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, 882458 + ... + 882603.

It is an arithmetic number, because the mean of its divisors is an integer number (32653647).

Almost surely, 2^128849453 is an apocalyptic number.

It is an amenable number.

128849453 is a deficient number, since it is larger than the sum of its proper divisors (1765135).

128849453 is an equidigital number, since it uses as much as digits as its factorization.

128849453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765134.

The product of its digits is 276480, while the sum is 44.

The square root of 128849453 is about 11351.1872947282. The cubic root of 128849453 is about 505.0808000635.

The spelling of 128849453 in words is "one hundred twenty-eight million, eight hundred forty-nine thousand, four hundred fifty-three".