135218827 has 2 divisors, whose sum is σ = 135218828. Its totient is φ = 135218826.

The previous prime is 135218813. The next prime is 135218887. The reversal of 135218827 is 728812531.

It is a weak prime.

It is an emirp because it is prime and its reverse (728812531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135218827 is a prime.

It is a Chen prime.

It is equal to p_7657192 and since 135218827 and 7657192 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (135218887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67609413 + 67609414.

It is an arithmetic number, because the mean of its divisors is an integer number (67609414).

Almost surely, 2^135218827 is an apocalyptic number.

135218827 is a deficient number, since it is larger than the sum of its proper divisors (1).

135218827 is an equidigital number, since it uses as much as digits as its factorization.

135218827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 135218827 is about 11628.3630404283. The cubic root of 135218827 is about 513.2698113430.

The spelling of 135218827 in words is "one hundred thirty-five million, two hundred eighteen thousand, eight hundred twenty-seven".