1899000001 has 2 divisors, whose sum is σ = 1899000002. Its totient is φ = 1899000000.

The previous prime is 1898999989. The next prime is 1899000007. The reversal of 1899000001 is 1000009981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1896689601 + 2310400 = 43551^2 + 1520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1899000001 - 2⁵ = 1898999969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1899000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949500000 + 949500001.

It is an arithmetic number, because the mean of its divisors is an integer number (949500001).

Almost surely, 2^1899000001 is an apocalyptic number.

It is an amenable number.

1899000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899000001 is an equidigital number, since it uses as much as digits as its factorization.

1899000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1899000001 is about 43577.5171504757. The cubic root of 1899000001 is about 1238.3450000783.

Adding to 1899000001 its reverse (1000009981), we get a palindrome (2899009982).

The spelling of 1899000001 in words is "one billion, eight hundred ninety-nine million, one", and thus it is an aban number.