1679939 has 2 divisors, whose sum is σ = 1679940. Its totient is φ = 1679938.

The previous prime is 1679917. The next prime is 1679959. The reversal of 1679939 is 9399761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1679939 - 2⁸ = 1679683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1679939.

It is not a weakly prime, because it can be changed into another prime (1679959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839969 + 839970.

It is an arithmetic number, because the mean of its divisors is an integer number (839970).

2^1679939 is an apocalyptic number.

1679939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679939 is an equidigital number, since it uses as much as digits as its factorization.

1679939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 44.

The square root of 1679939 is about 1296.1246082071. The cubic root of 1679939 is about 118.8770002313.

The spelling of 1679939 in words is "one million, six hundred seventy-nine thousand, nine hundred thirty-nine".