1913803 has 2 divisors, whose sum is σ = 1913804. Its totient is φ = 1913802.

The previous prime is 1913789. The next prime is 1913819. The reversal of 1913803 is 3083191.

It is a weak prime.

It is an emirp because it is prime and its reverse (3083191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1913803 - 2⁹ = 1913291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1913833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956901 + 956902.

It is an arithmetic number, because the mean of its divisors is an integer number (956902).

2^1913803 is an apocalyptic number.

1913803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913803 is an equidigital number, since it uses as much as digits as its factorization.

1913803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1913803 is about 1383.4026890244. The cubic root of 1913803 is about 124.1554372280.

Adding to 1913803 its reverse (3083191), we get a palindrome (4996994).

The spelling of 1913803 in words is "one million, nine hundred thirteen thousand, eight hundred three".