1916839 has 2 divisors, whose sum is σ = 1916840. Its totient is φ = 1916838.

The previous prime is 1916833. The next prime is 1916857. The reversal of 1916839 is 9386191.

It is a weak prime.

It is an emirp because it is prime and its reverse (9386191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1916839 - 2¹¹ = 1914791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1916798 and 1916807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958419 + 958420.

It is an arithmetic number, because the mean of its divisors is an integer number (958420).

2^1916839 is an apocalyptic number.

1916839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916839 is an equidigital number, since it uses as much as digits as its factorization.

1916839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 1916839 is about 1384.4995485734. The cubic root of 1916839 is about 124.2210547032.

The spelling of 1916839 in words is "one million, nine hundred sixteen thousand, eight hundred thirty-nine".