1969439 has 4 divisors (see below), whose sum is σ = 1972656. Its totient is φ = 1966224.

The previous prime is 1969423. The next prime is 1969447. The reversal of 1969439 is 9349691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1969439 - 2⁴ = 1969423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1969396 and 1969405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (493164).

2^1969439 is an apocalyptic number.

1969439 is a deficient number, since it is larger than the sum of its proper divisors (3217).

1969439 is an equidigital number, since it uses as much as digits as its factorization.

1969439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 52488, while the sum is 41.

The square root of 1969439 is about 1403.3670225568. The cubic root of 1969439 is about 125.3470674615.

The spelling of 1969439 in words is "one million, nine hundred sixty-nine thousand, four hundred thirty-nine".