280673473 has 4 divisors (see below), whose sum is σ = 289727488. Its totient is φ = 271619460.

The previous prime is 280673467. The next prime is 280673489. The reversal of 280673473 is 374376082.

It is a happy number.

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 280673473 - 2⁹ = 280672961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280673773) 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, 4526961 + ... + 4527022.

It is an arithmetic number, because the mean of its divisors is an integer number (72431872).

Almost surely, 2^280673473 is an apocalyptic number.

It is an amenable number.

280673473 is a deficient number, since it is larger than the sum of its proper divisors (9054015).

280673473 is an equidigital number, since it uses as much as digits as its factorization.

280673473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9054014.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 280673473 is about 16753.3122993634. The cubic root of 280673473 is about 654.7373598840.

The spelling of 280673473 in words is "two hundred eighty million, six hundred seventy-three thousand, four hundred seventy-three".