280460009 has 2 divisors, whose sum is σ = 280460010. Its totient is φ = 280460008.

The previous prime is 280459913. The next prime is 280460021. The reversal of 280460009 is 900064082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278890000 + 1570009 = 16700^2 + 1253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280460009 is a prime.

It is not a weakly prime, because it can be changed into another prime (280460209) 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, 140230004 + 140230005.

It is an arithmetic number, because the mean of its divisors is an integer number (140230005).

Almost surely, 2^280460009 is an apocalyptic number.

It is an amenable number.

280460009 is a deficient number, since it is larger than the sum of its proper divisors (1).

280460009 is an equidigital number, since it uses as much as digits as its factorization.

280460009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 280460009 is about 16746.9402877063. The cubic root of 280460009 is about 654.5713326720.

The spelling of 280460009 in words is "two hundred eighty million, four hundred sixty thousand, nine".