135021787 has 2 divisors, whose sum is σ = 135021788. Its totient is φ = 135021786.

The previous prime is 135021743. The next prime is 135021797. The reversal of 135021787 is 787120531.

It is a strong prime.

It is an emirp because it is prime and its reverse (787120531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135021787 - 2¹¹ = 135019739 is a prime.

It is not a weakly prime, because it can be changed into another prime (135021737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67510893 + 67510894.

It is an arithmetic number, because the mean of its divisors is an integer number (67510894).

Almost surely, 2^135021787 is an apocalyptic number.

135021787 is a deficient number, since it is larger than the sum of its proper divisors (1).

135021787 is an equidigital number, since it uses as much as digits as its factorization.

135021787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 135021787 is about 11619.8875639999. The cubic root of 135021787 is about 513.0203789971.

The spelling of 135021787 in words is "one hundred thirty-five million, twenty-one thousand, seven hundred eighty-seven".