1909426993 has 8 divisors (see below), whose sum is σ = 1919448000. Its totient is φ = 1899431760.

The previous prime is 1909426973. The next prime is 1909427053. The reversal of 1909426993 is 3996249091.

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 1909426993 - 2²⁵ = 1875872561 is a prime.

It is a super-2 number, since 2×1909426993² = 7291822883194044098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1909426993.

It is not an unprimeable number, because it can be changed into a prime (1909426963) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 152148 + ... + 164218.

It is an arithmetic number, because the mean of its divisors is an integer number (239931000).

Almost surely, 2^1909426993 is an apocalyptic number.

It is an amenable number.

1909426993 is a deficient number, since it is larger than the sum of its proper divisors (10021007).

1909426993 is a wasteful number, since it uses less digits than its factorization.

1909426993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12887.

The product of its (nonzero) digits is 944784, while the sum is 52.

The square root of 1909426993 is about 43696.9906629736. The cubic root of 1909426993 is about 1240.6073579017.

The spelling of 1909426993 in words is "one billion, nine hundred nine million, four hundred twenty-six thousand, nine hundred ninety-three".