819844345 has 4 divisors (see below), whose sum is σ = 983813220. Its totient is φ = 655875472.

The previous prime is 819844283. The next prime is 819844367. The reversal of 819844345 is 543448918.

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 280629504 + 539214841 = 16752^2 + 23221^2 .

It is a cyclic number.

It is not a de Polignac number, because 819844345 - 2¹³ = 819836153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 819844295 and 819844304.

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, 81984430 + ... + 81984439.

It is an arithmetic number, because the mean of its divisors is an integer number (245953305).

Almost surely, 2^819844345 is an apocalyptic number.

It is an amenable number.

819844345 is a deficient number, since it is larger than the sum of its proper divisors (163968875).

819844345 is a wasteful number, since it uses less digits than its factorization.

819844345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163968874.

The product of its digits is 552960, while the sum is 46.

The square root of 819844345 is about 28632.9241433703. The cubic root of 819844345 is about 935.9309343596.

The spelling of 819844345 in words is "eight hundred nineteen million, eight hundred forty-four thousand, three hundred forty-five".