280244969 has 2 divisors, whose sum is σ = 280244970. Its totient is φ = 280244968.

The previous prime is 280244917. The next prime is 280244981. The reversal of 280244969 is 969442082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278489344 + 1755625 = 16688^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 280244969 - 2¹⁶ = 280179433 is a prime.

It is a super-2 number, since 2×280244969² = 157074485299621922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (280243969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140122484 + 140122485.

It is an arithmetic number, because the mean of its divisors is an integer number (140122485).

Almost surely, 2^280244969 is an apocalyptic number.

It is an amenable number.

280244969 is a deficient number, since it is larger than the sum of its proper divisors (1).

280244969 is an equidigital number, since it uses as much as digits as its factorization.

280244969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 280244969 is about 16740.5187792971. The cubic root of 280244969 is about 654.4039944831.

The spelling of 280244969 in words is "two hundred eighty million, two hundred forty-four thousand, nine hundred sixty-nine".