100019 has 2 divisors, whose sum is σ = 100020.
Its totient is φ = 100018.
The previous prime is 100003. The next prime is 100043. The reversal of 100019 is 910001.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 100019 - 24 = 100003 is a prime.
It is a super-2 number, since 2×1000192 = 20007600722, which contains 22 as substring.
It is a Chen prime.
It is a plaindrome in base 13.
It is a junction number, because it is equal to n+sod(n) for n = 99982 and 100009.
It is not a weakly prime, because it can be changed into another prime (100049) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50009 + 50010.
It is an arithmetic number, because the mean of its divisors is an integer number (50010).
2100019 is an apocalyptic number.
100019 is a deficient number, since it is larger than the sum of its proper divisors (1).
100019 is an equidigital number, since it uses as much as digits as its factorization.
100019 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 9, while the sum is 11.
The square root of 100019 is about 316.2578062278.
The cubic root of 100019 is about 46.4188278229.
It can be divided in two parts, 10001 and 9, that multiplied together give a palindrome (90009).
The spelling of 100019 in words is "one hundred thousand, nineteen".