1001444009 has 2 divisors, whose sum is σ = 1001444010. Its totient is φ = 1001444008.

The previous prime is 1001443991. The next prime is 1001444011. The reversal of 1001444009 is 9004441001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576960400 + 424483609 = 24020^2 + 20603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001444009 - 2¹⁶ = 1001378473 is a prime.

Together with 1001444011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1001444099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500722004 + 500722005.

It is an arithmetic number, because the mean of its divisors is an integer number (500722005).

Almost surely, 2^1001444009 is an apocalyptic number.

It is an amenable number.

1001444009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001444009 is an equidigital number, since it uses as much as digits as its factorization.

1001444009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1001444009 is about 31645.6001523119. The cubic root of 1001444009 is about 1000.4811048344.

The spelling of 1001444009 in words is "one billion, one million, four hundred forty-four thousand, nine".