280143028247 has 4 divisors (see below), whose sum is σ = 281470720536. Its totient is φ = 278815335960.

The previous prime is 280143028213. The next prime is 280143028273. The reversal of 280143028247 is 742820341082.

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 280143028247 - 2¹² = 280143024151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280143028547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663845828 + ... + 663846249.

It is an arithmetic number, because the mean of its divisors is an integer number (70367680134).

Almost surely, 2^280143028247 is an apocalyptic number.

280143028247 is a deficient number, since it is larger than the sum of its proper divisors (1327692289).

280143028247 is a wasteful number, since it uses less digits than its factorization.

280143028247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327692288.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 280143028247 in words is "two hundred eighty billion, one hundred forty-three million, twenty-eight thousand, two hundred forty-seven".