280345063 has 2 divisors, whose sum is σ = 280345064. Its totient is φ = 280345062.

The previous prime is 280344979. The next prime is 280345073. The reversal of 280345063 is 360543082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280345063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280345073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140172531 + 140172532.

It is an arithmetic number, because the mean of its divisors is an integer number (140172532).

Almost surely, 2^280345063 is an apocalyptic number.

280345063 is a deficient number, since it is larger than the sum of its proper divisors (1).

280345063 is an equidigital number, since it uses as much as digits as its factorization.

280345063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 280345063 is about 16743.5080852252. The cubic root of 280345063 is about 654.4818955148.

The spelling of 280345063 in words is "two hundred eighty million, three hundred forty-five thousand, sixty-three".