280705063 has 2 divisors, whose sum is σ = 280705064. Its totient is φ = 280705062.

The previous prime is 280705039. The next prime is 280705081. The reversal of 280705063 is 360507082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280705063 - 2¹⁷ = 280573991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280705463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140352531 + 140352532.

It is an arithmetic number, because the mean of its divisors is an integer number (140352532).

Almost surely, 2^280705063 is an apocalyptic number.

280705063 is a deficient number, since it is larger than the sum of its proper divisors (1).

280705063 is an equidigital number, since it uses as much as digits as its factorization.

280705063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 280705063 is about 16754.2550714736. The cubic root of 280705063 is about 654.7619226818.

It can be divided in two parts, 28070 and 5063, that added together give a palindrome (33133).

The spelling of 280705063 in words is "two hundred eighty million, seven hundred five thousand, sixty-three".