135218047 has 2 divisors, whose sum is σ = 135218048. Its totient is φ = 135218046.

The previous prime is 135218033. The next prime is 135218053. The reversal of 135218047 is 740812531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135218047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135218087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67609023 + 67609024.

It is an arithmetic number, because the mean of its divisors is an integer number (67609024).

Almost surely, 2^135218047 is an apocalyptic number.

135218047 is a deficient number, since it is larger than the sum of its proper divisors (1).

135218047 is an equidigital number, since it uses as much as digits as its factorization.

135218047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 135218047 is about 11628.3295016954. The cubic root of 135218047 is about 513.2688244212.

The spelling of 135218047 in words is "one hundred thirty-five million, two hundred eighteen thousand, forty-seven".