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134689 = 3672

134689 has 3 divisors (see below), whose sum is σ = 135057. Its totient is φ = 134322.

The previous prime is 134683. The next prime is 134699. The reversal of 134689 is 986431.

134689 = T366 + T367.

The square root of 134689 is 367.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 134689 - 23 = 134681 is a prime.

It is a super-2 number, since 2×1346892 = 36282253442, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 134689.

It is not an unprimeable number, because it can be changed into a prime (134681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 184 + ... + 550.

It is an arithmetic number, because the mean of its divisors is an integer number (45019).

134689 is a Friedman number, since it can be written as (91*4+3)^(8-6), using all its digits and the basic arithmetic operations.

2134689 is an apocalyptic number.

134689 is the 367-th square number.

134689 is the 184-th centered octagonal number.

It is an amenable number.

134689 is a deficient number, since it is larger than the sum of its proper divisors (368).

134689 is an frugal number, since it uses more digits than its factorization.

134689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 367 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The cubic root of 134689 is about 51.2598553325.

Multiplying 134689 by its product of digits (5184), we get a square (698227776 = 264242).

The spelling of 134689 in words is "one hundred thirty-four thousand, six hundred eighty-nine".

Divisors: 1 367 134689