280608049 has 2 divisors, whose sum is σ = 280608050. Its totient is φ = 280608048.

The previous prime is 280608047. The next prime is 280608061. The reversal of 280608049 is 940806082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144769024 + 135839025 = 12032^2 + 11655^2 .

It is a cyclic number.

It is not a de Polignac number, because 280608049 - 2¹ = 280608047 is a prime.

Together with 280608047, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 280607999 and 280608017.

It is not a weakly prime, because it can be changed into another prime (280608043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140304024 + 140304025.

It is an arithmetic number, because the mean of its divisors is an integer number (140304025).

Almost surely, 2^280608049 is an apocalyptic number.

It is an amenable number.

280608049 is a deficient number, since it is larger than the sum of its proper divisors (1).

280608049 is an equidigital number, since it uses as much as digits as its factorization.

280608049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 280608049 is about 16751.3596164610. The cubic root of 280608049 is about 654.6864836051.

The spelling of 280608049 in words is "two hundred eighty million, six hundred eight thousand, forty-nine".