135995971 has 8 divisors (see below), whose sum is σ = 147345264. Its totient is φ = 125018880.

The previous prime is 135995969. The next prime is 135995983. The reversal of 135995971 is 179599531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135995971 - 2¹ = 135995969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135995771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92290 + ... + 93751.

It is an arithmetic number, because the mean of its divisors is an integer number (18418158).

Almost surely, 2^135995971 is an apocalyptic number.

135995971 is a deficient number, since it is larger than the sum of its proper divisors (11349293).

135995971 is a wasteful number, since it uses less digits than its factorization.

135995971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186101.

The product of its digits is 382725, while the sum is 49.

The square root of 135995971 is about 11661.7310464613. The cubic root of 135995971 is about 514.2512398004.

The spelling of 135995971 in words is "one hundred thirty-five million, nine hundred ninety-five thousand, nine hundred seventy-one".