281230633894993 has 2 divisors, whose sum is σ = 281230633894994. Its totient is φ = 281230633894992.

The previous prime is 281230633894967. The next prime is 281230633895117. The reversal of 281230633894993 is 399498336032182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241104591616849 + 40126042278144 = 15527543^2 + 6334512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281230633894993 is a prime.

It is not a weakly prime, because it can be changed into another prime (281230633894963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140615316947496 + 140615316947497.

It is an arithmetic number, because the mean of its divisors is an integer number (140615316947497).

Almost surely, 2^{281230633894993} is an apocalyptic number.

It is an amenable number.

281230633894993 is a deficient number, since it is larger than the sum of its proper divisors (1).

281230633894993 is an equidigital number, since it uses as much as digits as its factorization.

281230633894993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362797056, while the sum is 70.

The spelling of 281230633894993 in words is "two hundred eighty-one trillion, two hundred thirty billion, six hundred thirty-three million, eight hundred ninety-four thousand, nine hundred ninety-three".