1319909 has 2 divisors, whose sum is σ = 1319910. Its totient is φ = 1319908.

The previous prime is 1319893. The next prime is 1319917. The reversal of 1319909 is 9099131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 31684 = 1135^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319909 - 2⁴ = 1319893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659954 + 659955.

It is an arithmetic number, because the mean of its divisors is an integer number (659955).

2^1319909 is an apocalyptic number.

It is an amenable number.

1319909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319909 is an equidigital number, since it uses as much as digits as its factorization.

1319909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1319909 is about 1148.8729259583. The cubic root of 1319909 is about 109.6936101958.

The spelling of 1319909 in words is "one million, three hundred nineteen thousand, nine hundred nine".