280473 has 4 divisors (see below), whose sum is σ = 373968. Its totient is φ = 186980.

The previous prime is 280463. The next prime is 280487. The reversal of 280473 is 374082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280473 - 2⁶ = 280409 is a prime.

It is a D-number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280473.

It is not an unprimeable number, because it can be changed into a prime (280463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46743 + ... + 46748.

It is an arithmetic number, because the mean of its divisors is an integer number (93492).

2²⁸⁰⁴⁷³ is an apocalyptic number.

It is an amenable number.

280473 is a deficient number, since it is larger than the sum of its proper divisors (93495).

280473 is an equidigital number, since it uses as much as digits as its factorization.

280473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93494.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 280473 is about 529.5970166079. The cubic root of 280473 is about 65.4581439169.

The spelling of 280473 in words is "two hundred eighty thousand, four hundred seventy-three".