280267313 has 2 divisors, whose sum is σ = 280267314. Its totient is φ = 280267312.

The previous prime is 280267307. The next prime is 280267331. The reversal of 280267313 is 313762082.

It is a happy number.

Together with next prime (280267331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189007504 + 91259809 = 13748^2 + 9553^2 .

It is a cyclic number.

It is not a de Polignac number, because 280267313 - 2⁴ = 280267297 is a prime.

It is a super-4 number, since 4×280267313⁴ (a number of 35 digits) contains 4444 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280267313.

It is not a weakly prime, because it can be changed into another prime (280267343) 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, 140133656 + 140133657.

It is an arithmetic number, because the mean of its divisors is an integer number (140133657).

Almost surely, 2^280267313 is an apocalyptic number.

It is an amenable number.

280267313 is a deficient number, since it is larger than the sum of its proper divisors (1).

280267313 is an equidigital number, since it uses as much as digits as its factorization.

280267313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 280267313 is about 16741.1861288261. The cubic root of 280267313 is about 654.4213859512.

The spelling of 280267313 in words is "two hundred eighty million, two hundred sixty-seven thousand, three hundred thirteen".