809397169 has 16 divisors (see below), whose sum is σ = 974724480. Its totient is φ = 656570880.

The previous prime is 809397167. The next prime is 809397179. The reversal of 809397169 is 961793908.

It is not a de Polignac number, because 809397169 - 2¹ = 809397167 is a prime.

It is a super-2 number, since 2×809397169² = 1310247554370429122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809397167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154497 + ... + 159649.

It is an arithmetic number, because the mean of its divisors is an integer number (60920280).

Almost surely, 2^809397169 is an apocalyptic number.

It is an amenable number.

809397169 is a deficient number, since it is larger than the sum of its proper divisors (165327311).

809397169 is a wasteful number, since it uses less digits than its factorization.

809397169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 809397169 is about 28449.9063091603. The cubic root of 809397169 is about 931.9384430262.

The spelling of 809397169 in words is "eight hundred nine million, three hundred ninety-seven thousand, one hundred sixty-nine".