135780427 has 2 divisors, whose sum is σ = 135780428. Its totient is φ = 135780426.

The previous prime is 135780419. The next prime is 135780439. The reversal of 135780427 is 724087531.

It is a weak prime.

It is an emirp because it is prime and its reverse (724087531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135780427 - 2³ = 135780419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135780497) 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, 67890213 + 67890214.

It is an arithmetic number, because the mean of its divisors is an integer number (67890214).

Almost surely, 2^135780427 is an apocalyptic number.

135780427 is a deficient number, since it is larger than the sum of its proper divisors (1).

135780427 is an equidigital number, since it uses as much as digits as its factorization.

135780427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 135780427 is about 11652.4858721219. The cubic root of 135780427 is about 513.9794121869.

The spelling of 135780427 in words is "one hundred thirty-five million, seven hundred eighty thousand, four hundred twenty-seven".