1992839 has 2 divisors, whose sum is σ = 1992840. Its totient is φ = 1992838.

The previous prime is 1992817. The next prime is 1992841. The reversal of 1992839 is 9382991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1992839 - 2⁸ = 1992583 is a prime.

Together with 1992841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1992796 and 1992805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1992889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996419 + 996420.

It is an arithmetic number, because the mean of its divisors is an integer number (996420).

2^1992839 is an apocalyptic number.

1992839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992839 is an equidigital number, since it uses as much as digits as its factorization.

1992839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 1992839 is about 1411.6794962030. The cubic root of 1992839 is about 125.8415535859.

The spelling of 1992839 in words is "one million, nine hundred ninety-two thousand, eight hundred thirty-nine".