801740809 has 4 divisors (see below), whose sum is σ = 801913216. Its totient is φ = 801568404.

The previous prime is 801740801. The next prime is 801740833. The reversal of 801740809 is 908047108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 801740809 - 2³ = 801740801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801740801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79029 + ... + 88594.

It is an arithmetic number, because the mean of its divisors is an integer number (200478304).

Almost surely, 2^801740809 is an apocalyptic number.

It is an amenable number.

801740809 is a deficient number, since it is larger than the sum of its proper divisors (172407).

801740809 is a wasteful number, since it uses less digits than its factorization.

801740809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172406.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 801740809 is about 28315.0279710263. The cubic root of 801740809 is about 928.9906222126.

The spelling of 801740809 in words is "eight hundred one million, seven hundred forty thousand, eight hundred nine".