280330273 has 2 divisors, whose sum is σ = 280330274. Its totient is φ = 280330272.

The previous prime is 280330261. The next prime is 280330283. The reversal of 280330273 is 372033082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245141649 + 35188624 = 15657^2 + 5932^2 .

It is a cyclic number.

It is not a de Polignac number, because 280330273 - 2²¹ = 278233121 is a prime.

It is not a weakly prime, because it can be changed into another prime (280330283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140165136 + 140165137.

It is an arithmetic number, because the mean of its divisors is an integer number (140165137).

Almost surely, 2^280330273 is an apocalyptic number.

It is an amenable number.

280330273 is a deficient number, since it is larger than the sum of its proper divisors (1).

280330273 is an equidigital number, since it uses as much as digits as its factorization.

280330273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 280330273 is about 16743.0664156838. The cubic root of 280330273 is about 654.4703859399.

The spelling of 280330273 in words is "two hundred eighty million, three hundred thirty thousand, two hundred seventy-three".