133124438 has 4 divisors (see below), whose sum is σ = 199686660. Its totient is φ = 66562218.

The previous prime is 133124423. The next prime is 133124441. The reversal of 133124438 is 834421331.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133124438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33281108 + ... + 33281111.

It is an arithmetic number, because the mean of its divisors is an integer number (49921665).

Almost surely, 2^133124438 is an apocalyptic number.

133124438 is a deficient number, since it is larger than the sum of its proper divisors (66562222).

133124438 is an equidigital number, since it uses as much as digits as its factorization.

133124438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66562221.

The product of its digits is 6912, while the sum is 29.

The square root of 133124438 is about 11537.9564048405. The cubic root of 133124438 is about 510.6060180353.

Adding to 133124438 its reverse (834421331), we get a palindrome (967545769).

The spelling of 133124438 in words is "one hundred thirty-three million, one hundred twenty-four thousand, four hundred thirty-eight".