1966839 has 16 divisors (see below), whose sum is σ = 3040512. Its totient is φ = 1107648.

The previous prime is 1966831. The next prime is 1966841. The reversal of 1966839 is 9386691.

It is not a de Polignac number, because 1966839 - 2³ = 1966831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1966839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (190032).

2^1966839 is an apocalyptic number.

1966839 is a deficient number, since it is larger than the sum of its proper divisors (1073673).

1966839 is a wasteful number, since it uses less digits than its factorization.

1966839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366.

The product of its digits is 69984, while the sum is 42.

The square root of 1966839 is about 1402.4403730640. The cubic root of 1966839 is about 125.2918832362.

The spelling of 1966839 in words is "one million, nine hundred sixty-six thousand, eight hundred thirty-nine".