1798109 has 2 divisors, whose sum is σ = 1798110. Its totient is φ = 1798108.

The previous prime is 1798081. The next prime is 1798123. The reversal of 1798109 is 9018971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 792100 = 1003^2 + 890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1798109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798129) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899054 + 899055.

It is an arithmetic number, because the mean of its divisors is an integer number (899055).

2^1798109 is an apocalyptic number.

It is an amenable number.

1798109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798109 is an equidigital number, since it uses as much as digits as its factorization.

1798109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1798109 is about 1340.9358672211. The cubic root of 1798109 is about 121.6014270449.

The spelling of 1798109 in words is "one million, seven hundred ninety-eight thousand, one hundred nine".