135620871 has 4 divisors (see below), whose sum is σ = 180827832. Its totient is φ = 90413912.

The previous prime is 135620869. The next prime is 135620893. The reversal of 135620871 is 178026531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178026531 = 3 ⋅59342177.

It is a cyclic number.

It is not a de Polignac number, because 135620871 - 2¹ = 135620869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135620861) 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 in 3 ways as a sum of consecutive naturals, for example, 22603476 + ... + 22603481.

It is an arithmetic number, because the mean of its divisors is an integer number (45206958).

Almost surely, 2^135620871 is an apocalyptic number.

135620871 is a deficient number, since it is larger than the sum of its proper divisors (45206961).

135620871 is an equidigital number, since it uses as much as digits as its factorization.

135620871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45206960.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 135620871 is about 11645.6374235162. The cubic root of 135620871 is about 513.7780070097.

The spelling of 135620871 in words is "one hundred thirty-five million, six hundred twenty thousand, eight hundred seventy-one".