1706989 has 2 divisors, whose sum is σ = 1706990. Its totient is φ = 1706988.

The previous prime is 1706981. The next prime is 1707067. The reversal of 1706989 is 9896071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 366025 = 1158^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1706989 - 2³ = 1706981 is a prime.

It is a super-2 number, since 2×1706989² = 5827622892242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1706981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853494 + 853495.

It is an arithmetic number, because the mean of its divisors is an integer number (853495).

2^1706989 is an apocalyptic number.

It is an amenable number.

1706989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1706989 is an equidigital number, since it uses as much as digits as its factorization.

1706989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1706989 is about 1306.5178911902. The cubic root of 1706989 is about 119.5116495707.

The spelling of 1706989 in words is "one million, seven hundred six thousand, nine hundred eighty-nine".