280079047 has 4 divisors (see below), whose sum is σ = 280679256. Its totient is φ = 279478840.

The previous prime is 280079039. The next prime is 280079053. The reversal of 280079047 is 740970082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280079047 - 2³ = 280079039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280078997 and 280079015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280079347) 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, 299404 + ... + 300337.

It is an arithmetic number, because the mean of its divisors is an integer number (70169814).

Almost surely, 2^280079047 is an apocalyptic number.

280079047 is a deficient number, since it is larger than the sum of its proper divisors (600209).

280079047 is an equidigital number, since it uses as much as digits as its factorization.

280079047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600208.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 280079047 is about 16735.5623448990. The cubic root of 280079047 is about 654.2748200497.

The spelling of 280079047 in words is "two hundred eighty million, seventy-nine thousand, forty-seven".