1969839 has 20 divisors (see below), whose sum is σ = 2988216. Its totient is φ = 1292976.

The previous prime is 1969831. The next prime is 1969889. The reversal of 1969839 is 9389691.

It is not a de Polignac number, because 1969839 - 2³ = 1969831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1969794 and 1969803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969831) 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 in 19 ways as a sum of consecutive naturals, for example, 6577 + ... + 6869.

2^1969839 is an apocalyptic number.

1969839 is a deficient number, since it is larger than the sum of its proper divisors (1018377).

1969839 is an equidigital number, since it uses as much as digits as its factorization.

1969839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 379 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1969839 is about 1403.5095297147. The cubic root of 1969839 is about 125.3555530308.

The spelling of 1969839 in words is "one million, nine hundred sixty-nine thousand, eight hundred thirty-nine".