135553309 has 2 divisors, whose sum is σ = 135553310. Its totient is φ = 135553308.

The previous prime is 135553219. The next prime is 135553333. The reversal of 135553309 is 903355531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133333209 + 2220100 = 11547^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 135553309 - 2⁷ = 135553181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135553349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67776654 + 67776655.

It is an arithmetic number, because the mean of its divisors is an integer number (67776655).

Almost surely, 2^135553309 is an apocalyptic number.

It is an amenable number.

135553309 is a deficient number, since it is larger than the sum of its proper divisors (1).

135553309 is an equidigital number, since it uses as much as digits as its factorization.

135553309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30375, while the sum is 34.

The square root of 135553309 is about 11642.7363192679. The cubic root of 135553309 is about 513.6926768901.

The spelling of 135553309 in words is "one hundred thirty-five million, five hundred fifty-three thousand, three hundred nine".