133721353 has 2 divisors, whose sum is σ = 133721354. Its totient is φ = 133721352.

The previous prime is 133721339. The next prime is 133721363. The reversal of 133721353 is 353127331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94245264 + 39476089 = 9708^2 + 6283^2 .

It is a cyclic number.

It is not a de Polignac number, because 133721353 - 2¹³ = 133713161 is a prime.

It is not a weakly prime, because it can be changed into another prime (133721363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66860676 + 66860677.

It is an arithmetic number, because the mean of its divisors is an integer number (66860677).

Almost surely, 2^133721353 is an apocalyptic number.

It is an amenable number.

133721353 is a deficient number, since it is larger than the sum of its proper divisors (1).

133721353 is an equidigital number, since it uses as much as digits as its factorization.

133721353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 28.

The square root of 133721353 is about 11563.7949220833. The cubic root of 133721353 is about 511.3680468599.

Adding to 133721353 its reverse (353127331), we get a palindrome (486848684).

The spelling of 133721353 in words is "one hundred thirty-three million, seven hundred twenty-one thousand, three hundred fifty-three".