134243638 has 4 divisors (see below), whose sum is σ = 201365460. Its totient is φ = 67121818.

The previous prime is 134243633. The next prime is 134243651. The reversal of 134243638 is 836342431.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134243633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33560908 + ... + 33560911.

It is an arithmetic number, because the mean of its divisors is an integer number (50341365).

Almost surely, 2^134243638 is an apocalyptic number.

134243638 is a deficient number, since it is larger than the sum of its proper divisors (67121822).

134243638 is an equidigital number, since it uses as much as digits as its factorization.

134243638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67121821.

The product of its digits is 41472, while the sum is 34.

The square root of 134243638 is about 11586.3556824396. The cubic root of 134243638 is about 512.0329441489.

The spelling of 134243638 in words is "one hundred thirty-four million, two hundred forty-three thousand, six hundred thirty-eight".