280530469 has 2 divisors, whose sum is σ = 280530470. Its totient is φ = 280530468.

The previous prime is 280530463. The next prime is 280530493. The reversal of 280530469 is 964035082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264225025 + 16305444 = 16255^2 + 4038^2 .

It is a cyclic number.

It is not a de Polignac number, because 280530469 - 2²¹ = 278433317 is a prime.

It is a super-2 number, since 2×280530469² = 157394688074719922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280530463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140265234 + 140265235.

It is an arithmetic number, because the mean of its divisors is an integer number (140265235).

Almost surely, 2^280530469 is an apocalyptic number.

It is an amenable number.

280530469 is a deficient number, since it is larger than the sum of its proper divisors (1).

280530469 is an equidigital number, since it uses as much as digits as its factorization.

280530469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 280530469 is about 16749.0438234545. The cubic root of 280530469 is about 654.6261440924.

The spelling of 280530469 in words is "two hundred eighty million, five hundred thirty thousand, four hundred sixty-nine".