133979 has 2 divisors, whose sum is σ = 133980. Its totient is φ = 133978.

The previous prime is 133967. The next prime is 133981. The reversal of 133979 is 979331.

It is a happy number.

133979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133979 - 2⁴ = 133963 is a prime.

It is a Sophie Germain prime.

Together with 133981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66989 + 66990.

It is an arithmetic number, because the mean of its divisors is an integer number (66990).

2¹³³⁹⁷⁹ is an apocalyptic number.

133979 is a deficient number, since it is larger than the sum of its proper divisors (1).

133979 is an equidigital number, since it uses as much as digits as its factorization.

133979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5103, while the sum is 32.

The square root of 133979 is about 366.0314194164. The cubic root of 133979 is about 51.1696261496.

The spelling of 133979 in words is "one hundred thirty-three thousand, nine hundred seventy-nine".