134400509 has 8 divisors (see below), whose sum is σ = 142345440. Its totient is φ = 126542736.

The previous prime is 134400491. The next prime is 134400551. The reversal of 134400509 is 905004431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-134400509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134400559) 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 in 7 ways as a sum of consecutive naturals, for example, 18602 + ... + 24795.

It is an arithmetic number, because the mean of its divisors is an integer number (17793180).

Almost surely, 2^134400509 is an apocalyptic number.

134400509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

134400509 is a deficient number, since it is larger than the sum of its proper divisors (7944931).

134400509 is a wasteful number, since it uses less digits than its factorization.

134400509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43579.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 134400509 is about 11593.1233496414. The cubic root of 134400509 is about 512.2323126358.

The spelling of 134400509 in words is "one hundred thirty-four million, four hundred thousand, five hundred nine".