1803199913 has 2 divisors, whose sum is σ = 1803199914. Its totient is φ = 1803199912.

The previous prime is 1803199901. The next prime is 1803199939. The reversal of 1803199913 is 3199913081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1356596224 + 446603689 = 36832^2 + 21133^2 .

It is an emirp because it is prime and its reverse (3199913081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1803199913 - 2²⁴ = 1786422697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1803192913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901599956 + 901599957.

It is an arithmetic number, because the mean of its divisors is an integer number (901599957).

Almost surely, 2^1803199913 is an apocalyptic number.

It is an amenable number.

1803199913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1803199913 is an equidigital number, since it uses as much as digits as its factorization.

1803199913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 1803199913 is about 42464.1014622940. The cubic root of 1803199913 is about 1217.1608063584.

The spelling of 1803199913 in words is "one billion, eight hundred three million, one hundred ninety-nine thousand, nine hundred thirteen".