134047391 has 2 divisors, whose sum is σ = 134047392. Its totient is φ = 134047390.

The previous prime is 134047339. The next prime is 134047421. The reversal of 134047391 is 193740431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134047391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134047321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67023695 + 67023696.

It is an arithmetic number, because the mean of its divisors is an integer number (67023696).

Almost surely, 2^134047391 is an apocalyptic number.

134047391 is a deficient number, since it is larger than the sum of its proper divisors (1).

134047391 is an equidigital number, since it uses as much as digits as its factorization.

134047391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 134047391 is about 11577.8837012642. The cubic root of 134047391 is about 511.7833136118.

It can be divided in two parts, 13 and 4047391, that added together give a palindrome (4047404).

The spelling of 134047391 in words is "one hundred thirty-four million, forty-seven thousand, three hundred ninety-one".