1797386845 has 4 divisors (see below), whose sum is σ = 2156864220. Its totient is φ = 1437909472.

The previous prime is 1797386839. The next prime is 1797386849. The reversal of 1797386845 is 5486837971.

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 1043225401 + 754161444 = 32299^2 + 27462^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797386845 - 2²¹ = 1795289693 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1797386845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1797386849) 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, 179738680 + ... + 179738689.

It is an arithmetic number, because the mean of its divisors is an integer number (539216055).

Almost surely, 2^1797386845 is an apocalyptic number.

It is an amenable number.

1797386845 is a deficient number, since it is larger than the sum of its proper divisors (359477375).

1797386845 is an equidigital number, since it uses as much as digits as its factorization.

1797386845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359477374.

The product of its digits is 10160640, while the sum is 58.

The square root of 1797386845 is about 42395.5993588957. The cubic root of 1797386845 is about 1215.8514571138.

The spelling of 1797386845 in words is "one billion, seven hundred ninety-seven million, three hundred eighty-six thousand, eight hundred forty-five".