1999826113 has 2 divisors, whose sum is σ = 1999826114. Its totient is φ = 1999826112.

The previous prime is 1999826111. The next prime is 1999826131. The reversal of 1999826113 is 3116289991.

Together with next prime (1999826131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1867276944 + 132549169 = 43212^2 + 11513^2 .

It is an emirp because it is prime and its reverse (3116289991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1999826113 - 2¹ = 1999826111 is a prime.

Together with 1999826111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1999826111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999913056 + 999913057.

It is an arithmetic number, because the mean of its divisors is an integer number (999913057).

Almost surely, 2^1999826113 is an apocalyptic number.

It is an amenable number.

1999826113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999826113 is an equidigital number, since it uses as much as digits as its factorization.

1999826113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 49.

The square root of 1999826113 is about 44719.4153919749. The cubic root of 1999826113 is about 1259.8845348547.

The spelling of 1999826113 in words is "one billion, nine hundred ninety-nine million, eight hundred twenty-six thousand, one hundred thirteen".