281479271677921 has 2 divisors, whose sum is σ = 281479271677922. Its totient is φ = 281479271677920.

The previous prime is 281479271677883. The next prime is 281479271678009. The reversal of 281479271677921 is 129776172974182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145962642250000 + 135516629427921 = 12081500^2 + 11641161^2 .

It is a cyclic number.

It is not a de Polignac number, because 281479271677921 - 2²⁹ = 281478734807009 is a prime.

It is not a weakly prime, because it can be changed into another prime (281479271678921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140739635838960 + 140739635838961.

It is an arithmetic number, because the mean of its divisors is an integer number (140739635838961).

Almost surely, 2^{281479271677921} is an apocalyptic number.

It is an amenable number.

281479271677921 is a deficient number, since it is larger than the sum of its proper divisors (1).

281479271677921 is an equidigital number, since it uses as much as digits as its factorization.

281479271677921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 298722816, while the sum is 73.

The spelling of 281479271677921 in words is "two hundred eighty-one trillion, four hundred seventy-nine billion, two hundred seventy-one million, six hundred seventy-seven thousand, nine hundred twenty-one".