1909426994 has 8 divisors (see below), whose sum is σ = 2864490240. Its totient is φ = 954596916.

The previous prime is 1909426973. The next prime is 1909427053. The reversal of 1909426994 is 4996249091.

It is a happy number.

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

It is a super-2 number, since 2×1909426994² = 7291822890831752072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36134 + ... + 71585.

It is an arithmetic number, because the mean of its divisors is an integer number (358061280).

Almost surely, 2^1909426994 is an apocalyptic number.

1909426994 is a deficient number, since it is larger than the sum of its proper divisors (955063246).

1909426994 is a wasteful number, since it uses less digits than its factorization.

1909426994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116584.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 1909426994 is about 43696.9906744160. The cubic root of 1909426994 is about 1240.6073581183.

The spelling of 1909426994 in words is "one billion, nine hundred nine million, four hundred twenty-six thousand, nine hundred ninety-four".