1409449109 has 2 divisors, whose sum is σ = 1409449110. Its totient is φ = 1409449108.

The previous prime is 1409449099. The next prime is 1409449117. The reversal of 1409449109 is 9019449041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1076496100 + 332953009 = 32810^2 + 18247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1409449109 - 2²⁰ = 1408400533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1409449199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704724554 + 704724555.

It is an arithmetic number, because the mean of its divisors is an integer number (704724555).

Almost surely, 2^1409449109 is an apocalyptic number.

It is an amenable number.

1409449109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409449109 is an equidigital number, since it uses as much as digits as its factorization.

1409449109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1409449109 is about 37542.6305551436. The cubic root of 1409449109 is about 1121.2001137209.

The spelling of 1409449109 in words is "one billion, four hundred nine million, four hundred forty-nine thousand, one hundred nine".