1909073 has 4 divisors (see below), whose sum is σ = 1970688. Its totient is φ = 1847460.

The previous prime is 1909051. The next prime is 1909079. The reversal of 1909073 is 3709091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1909073 - 2⁸ = 1908817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1909079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30761 + ... + 30822.

It is an arithmetic number, because the mean of its divisors is an integer number (492672).

2^1909073 is an apocalyptic number.

It is an amenable number.

1909073 is a deficient number, since it is larger than the sum of its proper divisors (61615).

1909073 is an equidigital number, since it uses as much as digits as its factorization.

1909073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61614.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 1909073 is about 1381.6920785761. The cubic root of 1909073 is about 124.0530686826.

The spelling of 1909073 in words is "one million, nine hundred nine thousand, seventy-three".