134638443 has 20 divisors (see below), whose sum is σ = 204136680. Its totient is φ = 88415712.

The previous prime is 134638433. The next prime is 134638447. The reversal of 134638443 is 344836431.

It is a happy number.

134638443 is a `hidden beast` number, since 13 + 4 + 638 + 4 + 4 + 3 = 666.

It is not a de Polignac number, because 134638443 - 2⁵ = 134638411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134638398 and 134638407.

It is not an unprimeable number, because it can be changed into a prime (134638447) 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 19 ways as a sum of consecutive naturals, for example, 6978 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (10206834).

Almost surely, 2^134638443 is an apocalyptic number.

134638443 is a deficient number, since it is larger than the sum of its proper divisors (69498237).

134638443 is an equidigital number, since it uses as much as digits as its factorization.

134638443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888 (or 24879 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 134638443 is about 11603.3806711665. The cubic root of 134638443 is about 512.5344087943.

The spelling of 134638443 in words is "one hundred thirty-four million, six hundred thirty-eight thousand, four hundred forty-three".