135332321 has 2 divisors, whose sum is σ = 135332322. Its totient is φ = 135332320.

The previous prime is 135332311. The next prime is 135332339. The reversal of 135332321 is 123233531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69072721 + 66259600 = 8311^2 + 8140^2 .

It is an emirp because it is prime and its reverse (123233531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135332321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135332311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67666160 + 67666161.

It is an arithmetic number, because the mean of its divisors is an integer number (67666161).

Almost surely, 2^135332321 is an apocalyptic number.

It is an amenable number.

135332321 is a deficient number, since it is larger than the sum of its proper divisors (1).

135332321 is an equidigital number, since it uses as much as digits as its factorization.

135332321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 23.

The square root of 135332321 is about 11633.2420674548. The cubic root of 135332321 is about 513.4133730913.

Adding to 135332321 its reverse (123233531), we get a palindrome (258565852).

The spelling of 135332321 in words is "one hundred thirty-five million, three hundred thirty-two thousand, three hundred twenty-one".