134235691 has 2 divisors, whose sum is σ = 134235692. Its totient is φ = 134235690.

The previous prime is 134235641. The next prime is 134235701. The reversal of 134235691 is 196532431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134235691 is a prime.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is not a weakly prime, because it can be changed into another prime (134235601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67117845 + 67117846.

It is an arithmetic number, because the mean of its divisors is an integer number (67117846).

Almost surely, 2^134235691 is an apocalyptic number.

134235691 is a deficient number, since it is larger than the sum of its proper divisors (1).

134235691 is an equidigital number, since it uses as much as digits as its factorization.

134235691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 134235691 is about 11586.0127308751. The cubic root of 134235691 is about 512.0228401168.

The spelling of 134235691 in words is "one hundred thirty-four million, two hundred thirty-five thousand, six hundred ninety-one".