280991234233 has 4 divisors (see below), whose sum is σ = 282028102528. Its totient is φ = 279954365940.

The previous prime is 280991234221. The next prime is 280991234267. The reversal of 280991234233 is 332432199082.

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 280991234233 - 2²⁵ = 280957679801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280991234203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518433741 + ... + 518434282.

It is an arithmetic number, because the mean of its divisors is an integer number (70507025632).

Almost surely, 2^280991234233 is an apocalyptic number.

It is an amenable number.

280991234233 is a deficient number, since it is larger than the sum of its proper divisors (1036868295).

280991234233 is a wasteful number, since it uses less digits than its factorization.

280991234233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036868294.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 280991234233 in words is "two hundred eighty billion, nine hundred ninety-one million, two hundred thirty-four thousand, two hundred thirty-three".