134403391 has 2 divisors, whose sum is σ = 134403392. Its totient is φ = 134403390.

The previous prime is 134403349. The next prime is 134403469. The reversal of 134403391 is 193304431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134403391 - 2¹⁷ = 134272319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134403331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67201695 + 67201696.

It is an arithmetic number, because the mean of its divisors is an integer number (67201696).

Almost surely, 2^134403391 is an apocalyptic number.

134403391 is a deficient number, since it is larger than the sum of its proper divisors (1).

134403391 is an equidigital number, since it uses as much as digits as its factorization.

134403391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 134403391 is about 11593.2476467985. The cubic root of 134403391 is about 512.2359739389.

The spelling of 134403391 in words is "one hundred thirty-four million, four hundred three thousand, three hundred ninety-one".