133721339 has 2 divisors, whose sum is σ = 133721340. Its totient is φ = 133721338.

The previous prime is 133721299. The next prime is 133721353. The reversal of 133721339 is 933127331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133721339 - 2⁸ = 133721083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133721369) 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 as a sum of consecutive naturals, namely, 66860669 + 66860670.

It is an arithmetic number, because the mean of its divisors is an integer number (66860670).

Almost surely, 2^133721339 is an apocalyptic number.

133721339 is a deficient number, since it is larger than the sum of its proper divisors (1).

133721339 is an equidigital number, since it uses as much as digits as its factorization.

133721339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 32.

The square root of 133721339 is about 11563.7943167457. The cubic root of 133721339 is about 511.3680290139.

The spelling of 133721339 in words is "one hundred thirty-three million, seven hundred twenty-one thousand, three hundred thirty-nine".