800135809 has 8 divisors (see below), whose sum is σ = 918816480. Its totient is φ = 689112000.

The previous prime is 800135803. The next prime is 800135857. The reversal of 800135809 is 908531008.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800135809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800135803) 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, 1913992 + ... + 1914409.

It is an arithmetic number, because the mean of its divisors is an integer number (114852060).

Almost surely, 2^800135809 is an apocalyptic number.

It is an amenable number.

800135809 is a deficient number, since it is larger than the sum of its proper divisors (118680671).

800135809 is a wasteful number, since it uses less digits than its factorization.

800135809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828431.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 800135809 is about 28286.6719322016. The cubic root of 800135809 is about 928.3702945451.

The spelling of 800135809 in words is "eight hundred million, one hundred thirty-five thousand, eight hundred nine".