280104289 has 4 divisors (see below), whose sum is σ = 294846640. Its totient is φ = 265361940.

The previous prime is 280104269. The next prime is 280104317. The reversal of 280104289 is 982401082.

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 280104289 - 2⁹ = 280103777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280104229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7371147 + ... + 7371184.

It is an arithmetic number, because the mean of its divisors is an integer number (73711660).

Almost surely, 2^280104289 is an apocalyptic number.

It is an amenable number.

280104289 is a deficient number, since it is larger than the sum of its proper divisors (14742351).

280104289 is a wasteful number, since it uses less digits than its factorization.

280104289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14742350.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 280104289 is about 16736.3164704782. The cubic root of 280104289 is about 654.2944748686.

The spelling of 280104289 in words is "two hundred eighty million, one hundred four thousand, two hundred eighty-nine".