1009211447 has 2 divisors, whose sum is σ = 1009211448. Its totient is φ = 1009211446.

The previous prime is 1009211431. The next prime is 1009211449. The reversal of 1009211447 is 7441129001.

It is a strong prime.

It is an emirp because it is prime and its reverse (7441129001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009211447 - 2⁴ = 1009211431 is a prime.

Together with 1009211449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009211449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504605723 + 504605724.

It is an arithmetic number, because the mean of its divisors is an integer number (504605724).

Almost surely, 2^1009211447 is an apocalyptic number.

1009211447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009211447 is an equidigital number, since it uses as much as digits as its factorization.

1009211447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1009211447 is about 31768.0885008840. The cubic root of 1009211447 is about 1003.0611024241.

The spelling of 1009211447 in words is "one billion, nine million, two hundred eleven thousand, four hundred forty-seven".