135403321 has 2 divisors, whose sum is σ = 135403322. Its totient is φ = 135403320.

The previous prime is 135403273. The next prime is 135403337. The reversal of 135403321 is 123304531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 3980025 = 11464^2 + 1995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135403321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135403292 and 135403301.

It is not a weakly prime, because it can be changed into another prime (135409321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67701660 + 67701661.

It is an arithmetic number, because the mean of its divisors is an integer number (67701661).

Almost surely, 2^135403321 is an apocalyptic number.

It is an amenable number.

135403321 is a deficient number, since it is larger than the sum of its proper divisors (1).

135403321 is an equidigital number, since it uses as much as digits as its factorization.

135403321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 135403321 is about 11636.2932671878. The cubic root of 135403321 is about 513.5031421781.

Adding to 135403321 its reverse (123304531), we get a palindrome (258707852).

It can be divided in two parts, 13540 and 3321, that added together give a palindrome (16861).

The spelling of 135403321 in words is "one hundred thirty-five million, four hundred three thousand, three hundred twenty-one".