1938325009 has 4 divisors (see below), whose sum is σ = 1956440304. Its totient is φ = 1920209716.

The previous prime is 1938325007. The next prime is 1938325049. The reversal of 1938325009 is 9005238391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9005238391 = 31 ⋅290491561.

It is a cyclic number.

It is not a de Polignac number, because 1938325009 - 2¹ = 1938325007 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938325007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9057487 + ... + 9057700.

It is an arithmetic number, because the mean of its divisors is an integer number (489110076).

Almost surely, 2^1938325009 is an apocalyptic number.

It is an amenable number.

1938325009 is a deficient number, since it is larger than the sum of its proper divisors (18115295).

1938325009 is a wasteful number, since it uses less digits than its factorization.

1938325009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18115294.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1938325009 is about 44026.4126292388. The cubic root of 1938325009 is about 1246.8346598499.

The spelling of 1938325009 in words is "one billion, nine hundred thirty-eight million, three hundred twenty-five thousand, nine".