1999343 has 2 divisors, whose sum is σ = 1999344. Its totient is φ = 1999342.

The previous prime is 1999339. The next prime is 1999363. The reversal of 1999343 is 3439991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1999343 - 2² = 1999339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1999297 and 1999306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999303) 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, 999671 + 999672.

It is an arithmetic number, because the mean of its divisors is an integer number (999672).

2^1999343 is an apocalyptic number.

1999343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999343 is an equidigital number, since it uses as much as digits as its factorization.

1999343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 1999343 is about 1413.9812587160. The cubic root of 1999343 is about 125.9783073430.

The spelling of 1999343 in words is "one million, nine hundred ninety-nine thousand, three hundred forty-three".