280983823 has 4 divisors (see below), whose sum is σ = 281087080. Its totient is φ = 280880568.

The previous prime is 280983811. The next prime is 280983827. The reversal of 280983823 is 328389082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280983823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280983823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280983827) 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, 47433 + ... + 53026.

It is an arithmetic number, because the mean of its divisors is an integer number (70271770).

Almost surely, 2^280983823 is an apocalyptic number.

280983823 is a deficient number, since it is larger than the sum of its proper divisors (103257).

280983823 is a wasteful number, since it uses less digits than its factorization.

280983823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103256.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 280983823 is about 16762.5720878390. The cubic root of 280983823 is about 654.9785926224.

The spelling of 280983823 in words is "two hundred eighty million, nine hundred eighty-three thousand, eight hundred twenty-three".