281866049 has 2 divisors, whose sum is σ = 281866050. Its totient is φ = 281866048.

The previous prime is 281866009. The next prime is 281866073. The reversal of 281866049 is 940668182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207561649 + 74304400 = 14407^2 + 8620^2 .

It is a cyclic number.

It is not a de Polignac number, because 281866049 - 2¹² = 281861953 is a prime.

It is not a weakly prime, because it can be changed into another prime (281866009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140933024 + 140933025.

It is an arithmetic number, because the mean of its divisors is an integer number (140933025).

Almost surely, 2^281866049 is an apocalyptic number.

It is an amenable number.

281866049 is a deficient number, since it is larger than the sum of its proper divisors (1).

281866049 is an equidigital number, since it uses as much as digits as its factorization.

281866049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 281866049 is about 16788.8668170309. The cubic root of 281866049 is about 655.6633715879.

The spelling of 281866049 in words is "two hundred eighty-one million, eight hundred sixty-six thousand, forty-nine".