135366391 has 2 divisors, whose sum is σ = 135366392. Its totient is φ = 135366390.

The previous prime is 135366389. The next prime is 135366437. The reversal of 135366391 is 193663531.

It is a weak prime.

It is an emirp because it is prime and its reverse (193663531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135366391 - 2¹ = 135366389 is a prime.

Together with 135366389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 135366391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135366311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67683195 + 67683196.

It is an arithmetic number, because the mean of its divisors is an integer number (67683196).

Almost surely, 2^135366391 is an apocalyptic number.

135366391 is a deficient number, since it is larger than the sum of its proper divisors (1).

135366391 is an equidigital number, since it uses as much as digits as its factorization.

135366391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 37.

The square root of 135366391 is about 11634.7063134400. The cubic root of 135366391 is about 513.4564535267.

The spelling of 135366391 in words is "one hundred thirty-five million, three hundred sixty-six thousand, three hundred ninety-one".