134688909 has 8 divisors (see below), whose sum is σ = 190149120. Its totient is φ = 84510656.

The previous prime is 134688907. The next prime is 134688913. The reversal of 134688909 is 909886431.

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

It is a cyclic number.

It is not a de Polignac number, because 134688909 - 2¹ = 134688907 is a prime.

It is a super-2 number, since 2×134688909² = 36282204415220562, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134688901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320429 + ... + 1320530.

It is an arithmetic number, because the mean of its divisors is an integer number (23768640).

Almost surely, 2^134688909 is an apocalyptic number.

It is an amenable number.

134688909 is a deficient number, since it is larger than the sum of its proper divisors (55460211).

134688909 is a wasteful number, since it uses less digits than its factorization.

134688909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640979.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 134688909 is about 11605.5550922823. Note that the first 3 decimals coincide. The cubic root of 134688909 is about 512.5984378830.

The spelling of 134688909 in words is "one hundred thirty-four million, six hundred eighty-eight thousand, nine hundred nine".