9212009 has 2 divisors, whose sum is σ = 9212010. Its totient is φ = 9212008.

The previous prime is 9211999. The next prime is 9212033. The reversal of 9212009 is 9002129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9211225 + 784 = 3035^2 + 28^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9212009 is a prime.

It is a super-2 number, since 2×9212009² = 169722219632162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9212059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606004 + 4606005.

It is an arithmetic number, because the mean of its divisors is an integer number (4606005).

Almost surely, 2^9212009 is an apocalyptic number.

It is an amenable number.

9212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9212009 is an equidigital number, since it uses as much as digits as its factorization.

9212009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 9212009 is about 3035.1291570541. The cubic root of 9212009 is about 209.6290427604.

It can be divided in two parts, 9 and 212009, that multiplied together give a triangular number (1908081 = T₁₉₅₃).

The spelling of 9212009 in words is "nine million, two hundred twelve thousand, nine".