134442509 has 2 divisors, whose sum is σ = 134442510. Its totient is φ = 134442508.

The previous prime is 134442457. The next prime is 134442527. The reversal of 134442509 is 905244431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 65966884 = 8275^2 + 8122^2 .

It is a cyclic number.

It is not a de Polignac number, because 134442509 - 2²⁰ = 133393933 is a prime.

It is equal to p_7615634 and since 134442509 and 7615634 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134442559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67221254 + 67221255.

It is an arithmetic number, because the mean of its divisors is an integer number (67221255).

Almost surely, 2^134442509 is an apocalyptic number.

It is an amenable number.

134442509 is a deficient number, since it is larger than the sum of its proper divisors (1).

134442509 is an equidigital number, since it uses as much as digits as its factorization.

134442509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 134442509 is about 11594.9346268101. The cubic root of 134442509 is about 512.2856644093.

The spelling of 134442509 in words is "one hundred thirty-four million, four hundred forty-two thousand, five hundred nine".