1800001799 has 2 divisors, whose sum is σ = 1800001800. Its totient is φ = 1800001798.

The previous prime is 1800001787. The next prime is 1800001813. The reversal of 1800001799 is 9971000081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1800001799 - 2¹⁶ = 1799936263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1800001729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900000899 + 900000900.

It is an arithmetic number, because the mean of its divisors is an integer number (900000900).

Almost surely, 2^1800001799 is an apocalyptic number.

1800001799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800001799 is an equidigital number, since it uses as much as digits as its factorization.

1800001799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1800001799 is about 42426.4280726059. The cubic root of 1800001799 is about 1216.4408043694.

The spelling of 1800001799 in words is "one billion, eight hundred million, one thousand, seven hundred ninety-nine".