134404467191 has 4 divisors (see below), whose sum is σ = 134889682152. Its totient is φ = 133919252232.

The previous prime is 134404467187. The next prime is 134404467257. The reversal of 134404467191 is 191764404431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191764404431 = 97 ⋅1976952623.

It is a cyclic number.

It is not a de Polignac number, because 134404467191 - 2² = 134404467187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134404467121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242607065 + ... + 242607618.

It is an arithmetic number, because the mean of its divisors is an integer number (33722420538).

Almost surely, 2^134404467191 is an apocalyptic number.

134404467191 is a deficient number, since it is larger than the sum of its proper divisors (485214961).

134404467191 is an equidigital number, since it uses as much as digits as its factorization.

134404467191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485214960.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 134404467191 in words is "one hundred thirty-four billion, four hundred four million, four hundred sixty-seven thousand, one hundred ninety-one".