280792489 has 2 divisors, whose sum is σ = 280792490. Its totient is φ = 280792488.

The previous prime is 280792481. The next prime is 280792493. The reversal of 280792489 is 984297082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220077225 + 60715264 = 14835^2 + 7792^2 .

It is a cyclic number.

It is not a de Polignac number, because 280792489 - 2³ = 280792481 is a prime.

It is not a weakly prime, because it can be changed into another prime (280792481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140396244 + 140396245.

It is an arithmetic number, because the mean of its divisors is an integer number (140396245).

Almost surely, 2^280792489 is an apocalyptic number.

It is an amenable number.

280792489 is a deficient number, since it is larger than the sum of its proper divisors (1).

280792489 is an equidigital number, since it uses as much as digits as its factorization.

280792489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 280792489 is about 16756.8639369066. The cubic root of 280792489 is about 654.8298911436.

The spelling of 280792489 in words is "two hundred eighty million, seven hundred ninety-two thousand, four hundred eighty-nine".