809814997 has 8 divisors (see below), whose sum is σ = 822568256. Its totient is φ = 797081472.

The previous prime is 809814991. The next prime is 809815003. The reversal of 809814997 is 799418908.

It is an interprime number because it is at equal distance from previous prime (809814991) and next prime (809815003).

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 809814997 - 2¹⁹ = 809290709 is a prime.

It is a super-2 number, since 2×809814997² = 1311600658732220018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809814991) 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, 92773 + ... + 101125.

It is an arithmetic number, because the mean of its divisors is an integer number (102821032).

Almost surely, 2^809814997 is an apocalyptic number.

It is an amenable number.

809814997 is a deficient number, since it is larger than the sum of its proper divisors (12753259).

809814997 is a wasteful number, since it uses less digits than its factorization.

809814997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9867.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 809814997 is about 28457.2485844995. The cubic root of 809814997 is about 932.0987775756.

The spelling of 809814997 in words is "eight hundred nine million, eight hundred fourteen thousand, nine hundred ninety-seven".