135671953 has 4 divisors (see below), whose sum is σ = 135931888. Its totient is φ = 135412020.

The previous prime is 135671929. The next prime is 135671957. The reversal of 135671953 is 359176531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135671953 - 2²¹ = 133574801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135671957) 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, 129183 + ... + 130228.

It is an arithmetic number, because the mean of its divisors is an integer number (33982972).

Almost surely, 2^135671953 is an apocalyptic number.

It is an amenable number.

135671953 is a deficient number, since it is larger than the sum of its proper divisors (259935).

135671953 is an equidigital number, since it uses as much as digits as its factorization.

135671953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259934.

The product of its digits is 85050, while the sum is 40.

The square root of 135671953 is about 11647.8303988339. The cubic root of 135671953 is about 513.8425042452.

The spelling of 135671953 in words is "one hundred thirty-five million, six hundred seventy-one thousand, nine hundred fifty-three".