2009449019 has 2 divisors, whose sum is σ = 2009449020. Its totient is φ = 2009449018.

The previous prime is 2009449003. The next prime is 2009449037. The reversal of 2009449019 is 9109449002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2009449019 - 2⁴ = 2009449003 is a prime.

It is a super-2 number, since 2×2009449019² = 8075770719920124722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2009449069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004724509 + 1004724510.

It is an arithmetic number, because the mean of its divisors is an integer number (1004724510).

Almost surely, 2^2009449019 is an apocalyptic number.

2009449019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009449019 is an equidigital number, since it uses as much as digits as its factorization.

2009449019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 2009449019 is about 44826.8783097820. The cubic root of 2009449019 is about 1261.9021029844.

The spelling of 2009449019 in words is "two billion, nine million, four hundred forty-nine thousand, nineteen".