135386971 has 2 divisors, whose sum is σ = 135386972. Its totient is φ = 135386970.

The previous prime is 135386969. The next prime is 135387023. The reversal of 135386971 is 179683531.

135386971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (179683531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135386971 - 2¹ = 135386969 is a prime.

Together with 135386969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135386921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67693485 + 67693486.

It is an arithmetic number, because the mean of its divisors is an integer number (67693486).

Almost surely, 2^135386971 is an apocalyptic number.

135386971 is a deficient number, since it is larger than the sum of its proper divisors (1).

135386971 is an equidigital number, since it uses as much as digits as its factorization.

135386971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 135386971 is about 11635.5907026674. The cubic root of 135386971 is about 513.4824727828.

The spelling of 135386971 in words is "one hundred thirty-five million, three hundred eighty-six thousand, nine hundred seventy-one".