807870445 has 4 divisors (see below), whose sum is σ = 969444540. Its totient is φ = 646296352.

The previous prime is 807870439. The next prime is 807870449. The reversal of 807870445 is 544078708.

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 618367689 + 189502756 = 24867^2 + 13766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-807870445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (807870449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80787040 + ... + 80787049.

It is an arithmetic number, because the mean of its divisors is an integer number (242361135).

Almost surely, 2^807870445 is an apocalyptic number.

It is an amenable number.

807870445 is a deficient number, since it is larger than the sum of its proper divisors (161574095).

807870445 is a wasteful number, since it uses less digits than its factorization.

807870445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161574094.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 807870445 is about 28423.0618512503. The cubic root of 807870445 is about 931.3521184654.

The spelling of 807870445 in words is "eight hundred seven million, eight hundred seventy thousand, four hundred forty-five".