134706991 has 2 divisors, whose sum is σ = 134706992. Its totient is φ = 134706990.

The previous prime is 134706989. The next prime is 134707009. The reversal of 134706991 is 199607431.

It is a weak prime.

It is an emirp because it is prime and its reverse (199607431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134706991 - 2¹ = 134706989 is a prime.

It is a super-3 number, since 3×134706991³ (a number of 25 digits) contains 333 as substring.

Together with 134706989, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134706911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67353495 + 67353496.

It is an arithmetic number, because the mean of its divisors is an integer number (67353496).

Almost surely, 2^134706991 is an apocalyptic number.

134706991 is a deficient number, since it is larger than the sum of its proper divisors (1).

134706991 is an equidigital number, since it uses as much as digits as its factorization.

134706991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 134706991 is about 11606.3340896254. The cubic root of 134706991 is about 512.6213756544.

The spelling of 134706991 in words is "one hundred thirty-four million, seven hundred six thousand, nine hundred ninety-one".