281679121447 has 4 divisors (see below), whose sum is σ = 281695945840. Its totient is φ = 281662297056.

The previous prime is 281679121441. The next prime is 281679121469. The reversal of 281679121447 is 744121976182.

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-281679121447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281679121394 and 281679121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281679121441) 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, 8387058 + ... + 8420575.

It is an arithmetic number, because the mean of its divisors is an integer number (70423986460).

Almost surely, 2^281679121447 is an apocalyptic number.

281679121447 is a deficient number, since it is larger than the sum of its proper divisors (16824393).

281679121447 is a wasteful number, since it uses less digits than its factorization.

281679121447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16824392.

The product of its digits is 1354752, while the sum is 52.

The spelling of 281679121447 in words is "two hundred eighty-one billion, six hundred seventy-nine million, one hundred twenty-one thousand, four hundred forty-seven".