1909429423 has 8 divisors (see below), whose sum is σ = 2085454800. Its totient is φ = 1733810880.

The previous prime is 1909429421. The next prime is 1909429429. The reversal of 1909429423 is 3249249091.

It is a happy number.

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 1909429423 - 2¹ = 1909429421 is a prime.

It is a super-3 number, since 3×1909429423³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1909429423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909429421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91848 + ... + 110701.

It is an arithmetic number, because the mean of its divisors is an integer number (260681850).

Almost surely, 2^1909429423 is an apocalyptic number.

1909429423 is a deficient number, since it is larger than the sum of its proper divisors (176025377).

1909429423 is a wasteful number, since it uses less digits than its factorization.

1909429423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203417.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1909429423 is about 43697.0184680832. The cubic root of 1909429423 is about 1240.6078841808.

The spelling of 1909429423 in words is "one billion, nine hundred nine million, four hundred twenty-nine thousand, four hundred twenty-three".