280248469 has 2 divisors, whose sum is σ = 280248470. Its totient is φ = 280248468.

The previous prime is 280248403. The next prime is 280248481. The reversal of 280248469 is 964842082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262926225 + 17322244 = 16215^2 + 4162^2 .

It is a cyclic number.

It is not a de Polignac number, because 280248469 - 2⁷ = 280248341 is a prime.

It is a super-2 number, since 2×280248469² = 157078408753687922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280248869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140124234 + 140124235.

It is an arithmetic number, because the mean of its divisors is an integer number (140124235).

Almost surely, 2^280248469 is an apocalyptic number.

It is an amenable number.

280248469 is a deficient number, since it is larger than the sum of its proper divisors (1).

280248469 is an equidigital number, since it uses as much as digits as its factorization.

280248469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 280248469 is about 16740.6233157550. The cubic root of 280248469 is about 654.4067187716.

The spelling of 280248469 in words is "two hundred eighty million, two hundred forty-eight thousand, four hundred sixty-nine".