280463 has 2 divisors, whose sum is σ = 280464. Its totient is φ = 280462.

The previous prime is 280451. The next prime is 280487. The reversal of 280463 is 364082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280463 - 2⁸ = 280207 is a prime.

It is a super-3 number, since 3×280463³ = 66183233307638541, which contains 333 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁹ + 8 + 4 + 0 + 6⁷ + 3 .

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140231 + 140232.

It is an arithmetic number, because the mean of its divisors is an integer number (140232).

2²⁸⁰⁴⁶³ is an apocalyptic number.

280463 is a deficient number, since it is larger than the sum of its proper divisors (1).

280463 is an equidigital number, since it uses as much as digits as its factorization.

280463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 280463 is about 529.5875753830. The cubic root of 280463 is about 65.4573659582.

The spelling of 280463 in words is "two hundred eighty thousand, four hundred sixty-three".