135522389 has 2 divisors, whose sum is σ = 135522390. Its totient is φ = 135522388.

The previous prime is 135522341. The next prime is 135522391. The reversal of 135522389 is 983225531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111999889 + 23522500 = 10583^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 135522389 - 2¹² = 135518293 is a prime.

It is a Sophie Germain prime.

Together with 135522391, it forms a pair of twin primes.

It is a Chen 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 (135522089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67761194 + 67761195.

It is an arithmetic number, because the mean of its divisors is an integer number (67761195).

Almost surely, 2^135522389 is an apocalyptic number.

It is an amenable number.

135522389 is a deficient number, since it is larger than the sum of its proper divisors (1).

135522389 is an equidigital number, since it uses as much as digits as its factorization.

135522389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 135522389 is about 11641.4083769963. The cubic root of 135522389 is about 513.6536157869.

The spelling of 135522389 in words is "one hundred thirty-five million, five hundred twenty-two thousand, three hundred eighty-nine".