1999339 has 2 divisors, whose sum is σ = 1999340. Its totient is φ = 1999338.

The previous prime is 1999331. The next prime is 1999343. The reversal of 1999339 is 9339991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1999339 - 2³ = 1999331 is a prime.

1999339 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1999295 and 1999304.

It is not a weakly prime, because it can be changed into another prime (1999331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999669 + 999670.

It is an arithmetic number, because the mean of its divisors is an integer number (999670).

2^1999339 is an apocalyptic number.

1999339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999339 is an equidigital number, since it uses as much as digits as its factorization.

1999339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 43.

The square root of 1999339 is about 1413.9798442694. The cubic root of 1999339 is about 125.9782233298.

The spelling of 1999339 in words is "one million, nine hundred ninety-nine thousand, three hundred thirty-nine".