134856817 has 4 divisors (see below), whose sum is σ = 135004480. Its totient is φ = 134709156.

The previous prime is 134856809. The next prime is 134856859. The reversal of 134856817 is 718658431.

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: 718658431 = 251 ⋅2863181.

It is a cyclic number.

It is not a de Polignac number, because 134856817 - 2³ = 134856809 is a prime.

It is a super-2 number, since 2×134856817² = 36372722182742978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134856317) 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, 72453 + ... + 74290.

It is an arithmetic number, because the mean of its divisors is an integer number (33751120).

Almost surely, 2^134856817 is an apocalyptic number.

It is an amenable number.

134856817 is a deficient number, since it is larger than the sum of its proper divisors (147663).

134856817 is an equidigital number, since it uses as much as digits as its factorization.

134856817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147662.

The product of its digits is 161280, while the sum is 43.

The square root of 134856817 is about 11612.7867887084. The cubic root of 134856817 is about 512.8113572644.

It can be divided in two parts, 13485 and 6817, that added together give a palindrome (20302).

The spelling of 134856817 in words is "one hundred thirty-four million, eight hundred fifty-six thousand, eight hundred seventeen".