1801004789 has 2 divisors, whose sum is σ = 1801004790. Its totient is φ = 1801004788.

The previous prime is 1801004773. The next prime is 1801004839. The reversal of 1801004789 is 9874001081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1370110225 + 430894564 = 37015^2 + 20758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801004789 - 2⁴ = 1801004773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801009789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900502394 + 900502395.

It is an arithmetic number, because the mean of its divisors is an integer number (900502395).

Almost surely, 2^1801004789 is an apocalyptic number.

It is an amenable number.

1801004789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801004789 is an equidigital number, since it uses as much as digits as its factorization.

1801004789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 1801004789 is about 42438.2467710437. The cubic root of 1801004789 is about 1216.6667025542. Note that the first 3 decimals are identical.

The spelling of 1801004789 in words is "one billion, eight hundred one million, four thousand, seven hundred eighty-nine".