133099979 has 4 divisors (see below), whose sum is σ = 133835520. Its totient is φ = 132364440.

The previous prime is 133099973. The next prime is 133100017. The reversal of 133099979 is 979990331.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133099979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133099973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367499 + ... + 367860.

It is an arithmetic number, because the mean of its divisors is an integer number (33458880).

Almost surely, 2^133099979 is an apocalyptic number.

133099979 is a deficient number, since it is larger than the sum of its proper divisors (735541).

133099979 is an equidigital number, since it uses as much as digits as its factorization.

133099979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735540.

The product of its (nonzero) digits is 413343, while the sum is 50.

The square root of 133099979 is about 11536.8964197483. The cubic root of 133099979 is about 510.5747448452.

The spelling of 133099979 in words is "one hundred thirty-three million, ninety-nine thousand, nine hundred seventy-nine".