134436809 has 8 divisors (see below), whose sum is σ = 144870600. Its totient is φ = 124016256.

The previous prime is 134436803. The next prime is 134436821. The reversal of 134436809 is 908634431.

It can be written as a sum of positive squares in 4 ways, for example, as 26214400 + 108222409 = 5120^2 + 10403^2 .

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

It is not a de Polignac number, because 134436809 - 2⁴ = 134436793 is a prime.

It is a super-2 number, since 2×134436809² = 36146511228204962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134436803) 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, 31109 + ... + 35165.

It is an arithmetic number, because the mean of its divisors is an integer number (18108825).

Almost surely, 2^134436809 is an apocalyptic number.

It is an amenable number.

134436809 is a deficient number, since it is larger than the sum of its proper divisors (10433791).

134436809 is a wasteful number, since it uses less digits than its factorization.

134436809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 134436809 is about 11594.6888272174. The cubic root of 134436809 is about 512.2784244632.

The spelling of 134436809 in words is "one hundred thirty-four million, four hundred thirty-six thousand, eight hundred nine".