280705001 has 2 divisors, whose sum is σ = 280705002. Its totient is φ = 280705000.

The previous prime is 280704979. The next prime is 280705039. The reversal of 280705001 is 100507082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186595600 + 94109401 = 13660^2 + 9701^2 .

It is a cyclic number.

It is not a de Polignac number, because 280705001 - 2⁶ = 280704937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280705081) 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, 140352500 + 140352501.

It is an arithmetic number, because the mean of its divisors is an integer number (140352501).

Almost surely, 2^280705001 is an apocalyptic number.

It is an amenable number.

280705001 is a deficient number, since it is larger than the sum of its proper divisors (1).

280705001 is an equidigital number, since it uses as much as digits as its factorization.

280705001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 280705001 is about 16754.2532211973. The cubic root of 280705001 is about 654.7618744755.

The spelling of 280705001 in words is "two hundred eighty million, seven hundred five thousand, one".