280869097 has 2 divisors, whose sum is σ = 280869098. Its totient is φ = 280869096.

The previous prime is 280869073. The next prime is 280869131. The reversal of 280869097 is 790968082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150087001 + 130782096 = 12251^2 + 11436^2 .

It is a cyclic number.

It is not a de Polignac number, because 280869097 - 2¹¹ = 280867049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280869097.

It is not a weakly prime, because it can be changed into another prime (280869037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140434548 + 140434549.

It is an arithmetic number, because the mean of its divisors is an integer number (140434549).

Almost surely, 2^280869097 is an apocalyptic number.

It is an amenable number.

280869097 is a deficient number, since it is larger than the sum of its proper divisors (1).

280869097 is an equidigital number, since it uses as much as digits as its factorization.

280869097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 280869097 is about 16759.1496502657. The cubic root of 280869097 is about 654.8894376638.

The spelling of 280869097 in words is "two hundred eighty million, eight hundred sixty-nine thousand, ninety-seven".