1801890201 has 8 divisors (see below), whose sum is σ = 2402900640. Its totient is φ = 1201069952.

The previous prime is 1801890199. The next prime is 1801890229. The reversal of 1801890201 is 1020981081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1801890201 - 2¹ = 1801890199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1801890241) 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 7 ways as a sum of consecutive naturals, for example, 23736 + ... + 64553.

It is an arithmetic number, because the mean of its divisors is an integer number (300362580).

Almost surely, 2^1801890201 is an apocalyptic number.

It is an amenable number.

1801890201 is a deficient number, since it is larger than the sum of its proper divisors (601010439).

1801890201 is an equidigital number, since it uses as much as digits as its factorization.

1801890201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95095.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 1801890201 is about 42448.6772585436. The cubic root of 1801890201 is about 1216.8660495742.

The spelling of 1801890201 in words is "one billion, eight hundred one million, eight hundred ninety thousand, two hundred one".