1909079 has 2 divisors, whose sum is σ = 1909080. Its totient is φ = 1909078.

The previous prime is 1909051. The next prime is 1909081. The reversal of 1909079 is 9709091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1909079 is a prime.

Together with 1909081, 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 (1909279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954539 + 954540.

It is an arithmetic number, because the mean of its divisors is an integer number (954540).

2^1909079 is an apocalyptic number.

1909079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909079 is an equidigital number, since it uses as much as digits as its factorization.

1909079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1909079 is about 1381.6942498252. The cubic root of 1909079 is about 124.0531986441.

The spelling of 1909079 in words is "one million, nine hundred nine thousand, seventy-nine".