134591 has 2 divisors, whose sum is σ = 134592. Its totient is φ = 134590.
The previous prime is 134587. The next prime is 134593. The reversal of 134591 is 195431.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 134591 - 22 = 134587 is a prime.
It is a super-2 number, since 2×1345912 = 36229474562, which contains 22 as substring.
It is a Sophie Germain prime.
Together with 134593, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 9.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (134593) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67295 + 67296.
It is an arithmetic number, because the mean of its divisors is an integer number (67296).
2134591 is an apocalyptic number.
134591 is a deficient number, since it is larger than the sum of its proper divisors (1).
134591 is an equidigital number, since it uses as much as digits as its factorization.
134591 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 540, while the sum is 23.
The square root of 134591 is about 366.8664607183. The cubic root of 134591 is about 51.2474200565.
The spelling of 134591 in words is "one hundred thirty-four thousand, five hundred ninety-one".
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