281288473 has 2 divisors, whose sum is σ = 281288474. Its totient is φ = 281288472.

The previous prime is 281288461. The next prime is 281288489. The reversal of 281288473 is 374882182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255104784 + 26183689 = 15972^2 + 5117^2 .

It is a cyclic number.

It is not a de Polignac number, because 281288473 - 2⁹ = 281287961 is a prime.

It is not a weakly prime, because it can be changed into another prime (281288573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140644236 + 140644237.

It is an arithmetic number, because the mean of its divisors is an integer number (140644237).

Almost surely, 2^281288473 is an apocalyptic number.

It is an amenable number.

281288473 is a deficient number, since it is larger than the sum of its proper divisors (1).

281288473 is an equidigital number, since it uses as much as digits as its factorization.

281288473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 43.

The square root of 281288473 is about 16771.6568352682. The cubic root of 281288473 is about 655.2152220890.

The spelling of 281288473 in words is "two hundred eighty-one million, two hundred eighty-eight thousand, four hundred seventy-three".