1000019863 has 2 divisors, whose sum is σ = 1000019864. Its totient is φ = 1000019862.

The previous prime is 1000019861. The next prime is 1000019869. The reversal of 1000019863 is 3689100001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000019863 - 2¹ = 1000019861 is a prime.

Together with 1000019861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000019861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500009931 + 500009932.

It is an arithmetic number, because the mean of its divisors is an integer number (500009932).

Almost surely, 2^1000019863 is an apocalyptic number.

1000019863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000019863 is an equidigital number, since it uses as much as digits as its factorization.

1000019863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1000019863 is about 31623.0906617301. The cubic root of 1000019863 is about 1000.0066209562.

Adding to 1000019863 its reverse (3689100001), we get a palindrome (4689119864).

The spelling of 1000019863 in words is "one billion, nineteen thousand, eight hundred sixty-three".