280375942009 has 2 divisors, whose sum is σ = 280375942010. Its totient is φ = 280375942008.

The previous prime is 280375941997. The next prime is 280375942019. The reversal of 280375942009 is 900249573082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231688195600 + 48687746409 = 481340^2 + 220653^2 .

It is a cyclic number.

It is not a de Polignac number, because 280375942009 - 2⁵ = 280375941977 is a prime.

It is a super-2 number, since 2×280375942009² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (280375942019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140187971004 + 140187971005.

It is an arithmetic number, because the mean of its divisors is an integer number (140187971005).

Almost surely, 2^280375942009 is an apocalyptic number.

It is an amenable number.

280375942009 is a deficient number, since it is larger than the sum of its proper divisors (1).

280375942009 is an equidigital number, since it uses as much as digits as its factorization.

280375942009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 280375942009 in words is "two hundred eighty billion, three hundred seventy-five million, nine hundred forty-two thousand, nine".