133481879 has 4 divisors (see below), whose sum is σ = 133590000. Its totient is φ = 133373760.

The previous prime is 133481869. The next prime is 133481891. The reversal of 133481879 is 978184331.

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

It is a cyclic number.

It is not a de Polignac number, because 133481879 - 2¹² = 133477783 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 (133481869) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 52187 + ... + 54684.

It is an arithmetic number, because the mean of its divisors is an integer number (33397500).

Almost surely, 2^133481879 is an apocalyptic number.

133481879 is a deficient number, since it is larger than the sum of its proper divisors (108121).

133481879 is a wasteful number, since it uses less digits than its factorization.

133481879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108120.

The product of its digits is 145152, while the sum is 44.

The square root of 133481879 is about 11553.4358093166. The cubic root of 133481879 is about 511.0626044266.

The spelling of 133481879 in words is "one hundred thirty-three million, four hundred eighty-one thousand, eight hundred seventy-nine".