100019839 has 2 divisors, whose sum is σ = 100019840. Its totient is φ = 100019838.

The previous prime is 100019837. The next prime is 100019863. The reversal of 100019839 is 938910001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100019839 - 2¹ = 100019837 is a prime.

Together with 100019837, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 100019839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100019837) 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, 50009919 + 50009920.

It is an arithmetic number, because the mean of its divisors is an integer number (50009920).

Almost surely, 2^100019839 is an apocalyptic number.

100019839 is a deficient number, since it is larger than the sum of its proper divisors (1).

100019839 is an equidigital number, since it uses as much as digits as its factorization.

100019839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 100019839 is about 10000.9919008066. The cubic root of 100019839 is about 464.1895761586.

The spelling of 100019839 in words is "one hundred million, nineteen thousand, eight hundred thirty-nine".