280054949 has 2 divisors, whose sum is σ = 280054950. Its totient is φ = 280054948.

The previous prime is 280054933. The next prime is 280054963. The reversal of 280054949 is 949450082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207072100 + 72982849 = 14390^2 + 8543^2 .

It is a cyclic number.

It is not a de Polignac number, because 280054949 - 2⁴ = 280054933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280054909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140027474 + 140027475.

It is an arithmetic number, because the mean of its divisors is an integer number (140027475).

Almost surely, 2^280054949 is an apocalyptic number.

It is an amenable number.

280054949 is a deficient number, since it is larger than the sum of its proper divisors (1).

280054949 is an equidigital number, since it uses as much as digits as its factorization.

280054949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 280054949 is about 16734.8423655558. The cubic root of 280054949 is about 654.2560549106.

The spelling of 280054949 in words is "two hundred eighty million, fifty-four thousand, nine hundred forty-nine".