1789800049 has 4 divisors (see below), whose sum is σ = 1792013220. Its totient is φ = 1787586880.

The previous prime is 1789800041. The next prime is 1789800053. The reversal of 1789800049 is 9400089871.

It is a happy number.

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 774230625 + 1015569424 = 27825^2 + 31868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1789800049 - 2³ = 1789800041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1789799981 and 1789800008.

It is not an unprimeable number, because it can be changed into a prime (1789800041) 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, 1105372 + ... + 1106989.

It is an arithmetic number, because the mean of its divisors is an integer number (448003305).

Almost surely, 2^1789800049 is an apocalyptic number.

It is an amenable number.

1789800049 is a deficient number, since it is larger than the sum of its proper divisors (2213171).

1789800049 is an equidigital number, since it uses as much as digits as its factorization.

1789800049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213170.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 1789800049 is about 42306.0285184039. The cubic root of 1789800049 is about 1214.1383355863.

The spelling of 1789800049 in words is "one billion, seven hundred eighty-nine million, eight hundred thousand, forty-nine".