1909427 has 8 divisors (see below), whose sum is σ = 2069760. Its totient is φ = 1751040.

The previous prime is 1909421. The next prime is 1909429. The reversal of 1909427 is 7249091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1909427 - 2⁶ = 1909363 is a prime.

It is a super-2 number, since 2×1909427² = 7291822936658, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1909393 and 1909402.

It is not an unprimeable number, because it can be changed into a prime (1909421) 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 in 7 ways as a sum of consecutive naturals, for example, 2099 + ... + 2867.

It is an arithmetic number, because the mean of its divisors is an integer number (258720).

2^1909427 is an apocalyptic number.

1909427 is a deficient number, since it is larger than the sum of its proper divisors (160333).

1909427 is a wasteful number, since it uses less digits than its factorization.

1909427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1909427 is about 1381.8201764340. The cubic root of 1909427 is about 124.0607359418.

The spelling of 1909427 in words is "one million, nine hundred nine thousand, four hundred twenty-seven".