280258969 has 2 divisors, whose sum is σ = 280258970. Its totient is φ = 280258968.

The previous prime is 280258919. The next prime is 280258997. The reversal of 280258969 is 969852082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279558400 + 700569 = 16720^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 280258969 - 2¹³ = 280250777 is a prime.

It is a super-2 number, since 2×280258969² = 157090179409885922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (280258919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140129484 + 140129485.

It is an arithmetic number, because the mean of its divisors is an integer number (140129485).

Almost surely, 2^280258969 is an apocalyptic number.

It is an amenable number.

280258969 is a deficient number, since it is larger than the sum of its proper divisors (1).

280258969 is an equidigital number, since it uses as much as digits as its factorization.

280258969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 280258969 is about 16740.9369212120. The cubic root of 280258969 is about 654.4148915011.

The spelling of 280258969 in words is "two hundred eighty million, two hundred fifty-eight thousand, nine hundred sixty-nine".