134691356791 has 2 divisors, whose sum is σ = 134691356792. Its totient is φ = 134691356790.

The previous prime is 134691356777. The next prime is 134691356809. The reversal of 134691356791 is 197653196431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134691356791 - 2⁹ = 134691356279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134691356731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67345678395 + 67345678396.

It is an arithmetic number, because the mean of its divisors is an integer number (67345678396).

Almost surely, 2^134691356791 is an apocalyptic number.

134691356791 is a deficient number, since it is larger than the sum of its proper divisors (1).

134691356791 is an equidigital number, since it uses as much as digits as its factorization.

134691356791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The spelling of 134691356791 in words is "one hundred thirty-four billion, six hundred ninety-one million, three hundred fifty-six thousand, seven hundred ninety-one".