135404309 has 2 divisors, whose sum is σ = 135404310. Its totient is φ = 135404308.

The previous prime is 135404273. The next prime is 135404359. The reversal of 135404309 is 903404531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 17247409 = 10870^2 + 4153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135404309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135404359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67702154 + 67702155.

It is an arithmetic number, because the mean of its divisors is an integer number (67702155).

Almost surely, 2^135404309 is an apocalyptic number.

It is an amenable number.

135404309 is a deficient number, since it is larger than the sum of its proper divisors (1).

135404309 is an equidigital number, since it uses as much as digits as its factorization.

135404309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 135404309 is about 11636.3357204921. The cubic root of 135404309 is about 513.5043911378.

The spelling of 135404309 in words is "one hundred thirty-five million, four hundred four thousand, three hundred nine".