212074309 has 2 divisors, whose sum is σ = 212074310. Its totient is φ = 212074308.

The previous prime is 212074297. The next prime is 212074319. The reversal of 212074309 is 903470212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196840900 + 15233409 = 14030^2 + 3903^2 .

It is a cyclic number.

It is not a de Polignac number, because 212074309 - 2¹³ = 212066117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212074319) 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, 106037154 + 106037155.

It is an arithmetic number, because the mean of its divisors is an integer number (106037155).

Almost surely, 2^212074309 is an apocalyptic number.

It is an amenable number.

212074309 is a deficient number, since it is larger than the sum of its proper divisors (1).

212074309 is an equidigital number, since it uses as much as digits as its factorization.

212074309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 212074309 is about 14562.7713365279. The cubic root of 212074309 is about 596.3428550338.

The spelling of 212074309 in words is "two hundred twelve million, seventy-four thousand, three hundred nine".