2009569378 has 4 divisors (see below), whose sum is σ = 3014354070. Its totient is φ = 1004784688.

The previous prime is 2009569321. The next prime is 2009569379. The reversal of 2009569378 is 8739659002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1415038689 + 594530689 = 37617^2 + 24383^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2009569379) 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 as a sum of consecutive naturals, namely, 502392343 + ... + 502392346.

Almost surely, 2^2009569378 is an apocalyptic number.

2009569378 is a deficient number, since it is larger than the sum of its proper divisors (1004784692).

2009569378 is a wasteful number, since it uses less digits than its factorization.

2009569378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004784691.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 2009569378 is about 44828.2207766492. The cubic root of 2009569378 is about 1261.9272969956.

The spelling of 2009569378 in words is "two billion, nine million, five hundred sixty-nine thousand, three hundred seventy-eight".