1872200473009 has 2 divisors, whose sum is σ = 1872200473010. Its totient is φ = 1872200473008.

The previous prime is 1872200473001. The next prime is 1872200473103. The reversal of 1872200473009 is 9003740022781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1576430913600 + 295769559409 = 1255560^2 + 543847^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872200473009 - 2³ = 1872200473001 is a prime.

It is a super-2 number, since 2×1872200473009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1872200473001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936100236504 + 936100236505.

It is an arithmetic number, because the mean of its divisors is an integer number (936100236505).

Almost surely, 2^{1872200473009} is an apocalyptic number.

It is an amenable number.

1872200473009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872200473009 is an equidigital number, since it uses as much as digits as its factorization.

1872200473009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 1872200473009 in words is "one trillion, eight hundred seventy-two billion, two hundred million, four hundred seventy-three thousand, nine".