212960009 has 2 divisors, whose sum is σ = 212960010. Its totient is φ = 212960008.

The previous prime is 212959993. The next prime is 212960023. The reversal of 212960009 is 900069212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116035984 + 96924025 = 10772^2 + 9845^2 .

It is a cyclic number.

It is not a de Polignac number, because 212960009 - 2⁴ = 212959993 is a prime.

It is not a weakly prime, because it can be changed into another prime (212960039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106480004 + 106480005.

It is an arithmetic number, because the mean of its divisors is an integer number (106480005).

Almost surely, 2^212960009 is an apocalyptic number.

It is an amenable number.

212960009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212960009 is an equidigital number, since it uses as much as digits as its factorization.

212960009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 212960009 is about 14593.1493859276. The cubic root of 212960009 is about 597.1718840633.

The spelling of 212960009 in words is "two hundred twelve million, nine hundred sixty thousand, nine".