280597949 has 2 divisors, whose sum is σ = 280597950. Its totient is φ = 280597948.

The previous prime is 280597931. The next prime is 280597969. The reversal of 280597949 is 949795082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277056025 + 3541924 = 16645^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 280597949 - 2¹² = 280593853 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280597949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280597969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140298974 + 140298975.

It is an arithmetic number, because the mean of its divisors is an integer number (140298975).

Almost surely, 2^280597949 is an apocalyptic number.

It is an amenable number.

280597949 is a deficient number, since it is larger than the sum of its proper divisors (1).

280597949 is an equidigital number, since it uses as much as digits as its factorization.

280597949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 280597949 is about 16751.0581456814. The cubic root of 280597949 is about 654.6786287427.

The spelling of 280597949 in words is "two hundred eighty million, five hundred ninety-seven thousand, nine hundred forty-nine".