1679917 has 2 divisors, whose sum is σ = 1679918. Its totient is φ = 1679916.

The previous prime is 1679903. The next prime is 1679939. The reversal of 1679917 is 7199761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1394761 + 285156 = 1181^2 + 534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679917 - 2¹⁹ = 1155629 is a prime.

It is a super-2 number, since 2×1679917² = 5644242253778, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1679917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839958 + 839959.

It is an arithmetic number, because the mean of its divisors is an integer number (839959).

2^1679917 is an apocalyptic number.

It is an amenable number.

1679917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679917 is an equidigital number, since it uses as much as digits as its factorization.

1679917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 40.

The square root of 1679917 is about 1296.1161213410. The cubic root of 1679917 is about 118.8764813027.

The spelling of 1679917 in words is "one million, six hundred seventy-nine thousand, nine hundred seventeen".