135471953 has 4 divisors (see below), whose sum is σ = 139842048. Its totient is φ = 131101860.

The previous prime is 135471949. The next prime is 135471961. The reversal of 135471953 is 359174531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 359174531 = 4241 ⋅84691.

It is a cyclic number.

It is not a de Polignac number, because 135471953 - 2² = 135471949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135471943) 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, 2185001 + ... + 2185062.

It is an arithmetic number, because the mean of its divisors is an integer number (34960512).

Almost surely, 2^135471953 is an apocalyptic number.

It is an amenable number.

135471953 is a deficient number, since it is larger than the sum of its proper divisors (4370095).

135471953 is an equidigital number, since it uses as much as digits as its factorization.

135471953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370094.

The product of its digits is 56700, while the sum is 38.

The square root of 135471953 is about 11639.2419426696. The cubic root of 135471953 is about 513.5898874528.

The spelling of 135471953 in words is "one hundred thirty-five million, four hundred seventy-one thousand, nine hundred fifty-three".