2009919 has 8 divisors (see below), whose sum is σ = 2730672. Its totient is φ = 1314560.

The previous prime is 2009911. The next prime is 2009921. The reversal of 2009919 is 9199002.

2009919 is nontrivially palindromic in base 9.

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 2009919 - 2³ = 2009911 is a prime.

It is a super-2 number, since 2×2009919² = 8079548773122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6162 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (341334).

It is the magic constant of a 159 × 159 magic square.

2^2009919 is an apocalyptic number.

2009919 is a deficient number, since it is larger than the sum of its proper divisors (720753).

2009919 is a wasteful number, since it uses less digits than its factorization.

2009919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12697.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 2009919 is about 1417.7161210905. The cubic root of 2009919 is about 126.2000475519.

The spelling of 2009919 in words is "two million, nine thousand, nine hundred nineteen".