1898868001 has 2 divisors, whose sum is σ = 1898868002. Its totient is φ = 1898868000.

The previous prime is 1898867899. The next prime is 1898868121. The reversal of 1898868001 is 1008688981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1898867776 + 225 = 43576^2 + 15^2 .

It is an emirp because it is prime and its reverse (1008688981) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1008988681 and 1868898001.

It is a cyclic number.

It is not a de Polignac number, because 1898868001 - 2⁹ = 1898867489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1898868901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949434000 + 949434001.

It is an arithmetic number, because the mean of its divisors is an integer number (949434001).

Almost surely, 2^1898868001 is an apocalyptic number.

It is an amenable number.

1898868001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898868001 is an equidigital number, since it uses as much as digits as its factorization.

1898868001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 49.

The square root of 1898868001 is about 43576.0025816963. The cubic root of 1898868001 is about 1238.3163068489.

The spelling of 1898868001 in words is "one billion, eight hundred ninety-eight million, eight hundred sixty-eight thousand, one".