1909342 has 4 divisors (see below), whose sum is σ = 2864016. Its totient is φ = 954670.

The previous prime is 1909333. The next prime is 1909343. The reversal of 1909342 is 2439091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1909342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909343) 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, 477334 + ... + 477337.

It is an arithmetic number, because the mean of its divisors is an integer number (716004).

2^1909342 is an apocalyptic number.

1909342 is a deficient number, since it is larger than the sum of its proper divisors (954674).

1909342 is an equidigital number, since it uses as much as digits as its factorization.

1909342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954673.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1909342 is about 1381.7894195571. The cubic root of 1909342 is about 124.0588950197.

The spelling of 1909342 in words is "one million, nine hundred nine thousand, three hundred forty-two".