1941406009 has 2 divisors, whose sum is σ = 1941406010. Its totient is φ = 1941406008.

The previous prime is 1941406007. The next prime is 1941406123. The reversal of 1941406009 is 9006041491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1938464784 + 2941225 = 44028^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941406009 - 2¹ = 1941406007 is a prime.

Together with 1941406007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1941406007) 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, 970703004 + 970703005.

It is an arithmetic number, because the mean of its divisors is an integer number (970703005).

Almost surely, 2^1941406009 is an apocalyptic number.

It is an amenable number.

1941406009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941406009 is an equidigital number, since it uses as much as digits as its factorization.

1941406009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1941406009 is about 44061.3890952158. The cubic root of 1941406009 is about 1247.4949316463.

The spelling of 1941406009 in words is "one billion, nine hundred forty-one million, four hundred six thousand, nine".