135546971 has 4 divisors (see below), whose sum is σ = 154910832. Its totient is φ = 116183112.

The previous prime is 135546959. The next prime is 135546977. The reversal of 135546971 is 179645531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179645531 = 13 ⋅13818887.

It is a cyclic number.

It is not a de Polignac number, because 135546971 - 2⁶ = 135546907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135546977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9681920 + ... + 9681933.

It is an arithmetic number, because the mean of its divisors is an integer number (38727708).

Almost surely, 2^135546971 is an apocalyptic number.

135546971 is a deficient number, since it is larger than the sum of its proper divisors (19363861).

135546971 is an equidigital number, since it uses as much as digits as its factorization.

135546971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19363860.

The product of its digits is 113400, while the sum is 41.

The square root of 135546971 is about 11642.4641292125. The cubic root of 135546971 is about 513.6846706060.

The spelling of 135546971 in words is "one hundred thirty-five million, five hundred forty-six thousand, nine hundred seventy-one".