134812861 has 2 divisors, whose sum is σ = 134812862. Its totient is φ = 134812860.

The previous prime is 134812859. The next prime is 134812871. The reversal of 134812861 is 168218431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112487236 + 22325625 = 10606^2 + 4725^2 .

It is a cyclic number.

It is not a de Polignac number, because 134812861 - 2¹ = 134812859 is a prime.

Together with 134812859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134812871) 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, 67406430 + 67406431.

It is an arithmetic number, because the mean of its divisors is an integer number (67406431).

Almost surely, 2^134812861 is an apocalyptic number.

It is an amenable number.

134812861 is a deficient number, since it is larger than the sum of its proper divisors (1).

134812861 is an equidigital number, since it uses as much as digits as its factorization.

134812861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 134812861 is about 11610.8940654887. The cubic root of 134812861 is about 512.7556349904.

The spelling of 134812861 in words is "one hundred thirty-four million, eight hundred twelve thousand, eight hundred sixty-one".