1800198001 has 4 divisors (see below), whose sum is σ = 2057369152. Its totient is φ = 1543026852.

The previous prime is 1800197989. The next prime is 1800198019. The reversal of 1800198001 is 1008910081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1800198001 - 2¹¹ = 1800195953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1800198091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128585565 + ... + 128585578.

It is an arithmetic number, because the mean of its divisors is an integer number (514342288).

Almost surely, 2^1800198001 is an apocalyptic number.

It is an amenable number.

1800198001 is a deficient number, since it is larger than the sum of its proper divisors (257171151).

1800198001 is an equidigital number, since it uses as much as digits as its factorization.

1800198001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257171150.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1800198001 is about 42428.7402711888. The cubic root of 1800198001 is about 1216.4850005192.

The spelling of 1800198001 in words is "one billion, eight hundred million, one hundred ninety-eight thousand, one".