1879439 has 2 divisors, whose sum is σ = 1879440. Its totient is φ = 1879438.

The previous prime is 1879429. The next prime is 1879453. The reversal of 1879439 is 9349781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1879439 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1879396 and 1879405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1879429) 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 as a sum of consecutive naturals, namely, 939719 + 939720.

It is an arithmetic number, because the mean of its divisors is an integer number (939720).

2^1879439 is an apocalyptic number.

1879439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1879439 is an equidigital number, since it uses as much as digits as its factorization.

1879439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 1879439 is about 1370.9263291658. The cubic root of 1879439 is about 123.4078382716.

The spelling of 1879439 in words is "one million, eight hundred seventy-nine thousand, four hundred thirty-nine".