809416145 has 4 divisors (see below), whose sum is σ = 971299380. Its totient is φ = 647532912.

The previous prime is 809416123. The next prime is 809416183. The reversal of 809416145 is 541614908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 489471376 + 319944769 = 22124^2 + 17887^2 .

It is a cyclic number.

It is not a de Polignac number, because 809416145 - 2⁶ = 809416081 is a prime.

It is a super-2 number, since 2×809416145² = 1310308991573322050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 809416099 and 809416108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80941610 + ... + 80941619.

It is an arithmetic number, because the mean of its divisors is an integer number (242824845).

Almost surely, 2^809416145 is an apocalyptic number.

It is an amenable number.

809416145 is a deficient number, since it is larger than the sum of its proper divisors (161883235).

809416145 is a wasteful number, since it uses less digits than its factorization.

809416145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161883234.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 809416145 is about 28450.2398056677. The cubic root of 809416145 is about 931.9457259467.

The spelling of 809416145 in words is "eight hundred nine million, four hundred sixteen thousand, one hundred forty-five".