274985209 has 2 divisors, whose sum is σ = 274985210. Its totient is φ = 274985208.

The previous prime is 274985197. The next prime is 274985213. The reversal of 274985209 is 902589472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274631184 + 354025 = 16572^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 274985209 - 2¹⁷ = 274854137 is a prime.

It is not a weakly prime, because it can be changed into another prime (274985299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137492604 + 137492605.

It is an arithmetic number, because the mean of its divisors is an integer number (137492605).

Almost surely, 2^274985209 is an apocalyptic number.

It is an amenable number.

274985209 is a deficient number, since it is larger than the sum of its proper divisors (1).

274985209 is an equidigital number, since it uses as much as digits as its factorization.

274985209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 274985209 is about 16582.6779803505. The cubic root of 274985209 is about 650.2840643996.

The spelling of 274985209 in words is "two hundred seventy-four million, nine hundred eighty-five thousand, two hundred nine".