280880461 has 2 divisors, whose sum is σ = 280880462. Its totient is φ = 280880460.

The previous prime is 280880447. The next prime is 280880489. The reversal of 280880461 is 164088082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187854436 + 93026025 = 13706^2 + 9645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280880461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280880461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280880441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140440230 + 140440231.

It is an arithmetic number, because the mean of its divisors is an integer number (140440231).

Almost surely, 2^280880461 is an apocalyptic number.

It is an amenable number.

280880461 is a deficient number, since it is larger than the sum of its proper divisors (1).

280880461 is an equidigital number, since it uses as much as digits as its factorization.

280880461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 280880461 is about 16759.4886855178. The cubic root of 280880461 is about 654.8982698485.

The spelling of 280880461 in words is "two hundred eighty million, eight hundred eighty thousand, four hundred sixty-one".