806389445 has 4 divisors (see below), whose sum is σ = 967667340. Its totient is φ = 645111552.

The previous prime is 806389429. The next prime is 806389447. The reversal of 806389445 is 544983608.

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 156700324 + 649689121 = 12518^2 + 25489^2 .

It is a cyclic number.

It is not a de Polignac number, because 806389445 - 2⁴ = 806389429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 806389445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806389447) 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, 80638940 + ... + 80638949.

It is an arithmetic number, because the mean of its divisors is an integer number (241916835).

Almost surely, 2^806389445 is an apocalyptic number.

It is an amenable number.

806389445 is a deficient number, since it is larger than the sum of its proper divisors (161277895).

806389445 is a wasteful number, since it uses less digits than its factorization.

806389445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161277894.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 806389445 is about 28396.9971123709. The cubic root of 806389445 is about 930.7826475284.

The spelling of 806389445 in words is "eight hundred six million, three hundred eighty-nine thousand, four hundred forty-five".