1081709 has 2 divisors, whose sum is σ = 1081710. Its totient is φ = 1081708.

The previous prime is 1081699. The next prime is 1081711. The reversal of 1081709 is 9071801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 184900 = 947^2 + 430^2 .

It is an emirp because it is prime and its reverse (9071801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081709 - 2¹⁶ = 1016173 is a prime.

Together with 1081711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540854 + 540855.

It is an arithmetic number, because the mean of its divisors is an integer number (540855).

2^1081709 is an apocalyptic number.

It is an amenable number.

1081709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081709 is an equidigital number, since it uses as much as digits as its factorization.

1081709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1081709 is about 1040.0524025259. The cubic root of 1081709 is about 102.6526458524.

The spelling of 1081709 in words is "one million, eighty-one thousand, seven hundred nine".