449574781 has 2 divisors, whose sum is σ = 449574782. Its totient is φ = 449574780.

The previous prime is 449574737. The next prime is 449574833. The reversal of 449574781 is 187475944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409455225 + 40119556 = 20235^2 + 6334^2 .

It is a cyclic number.

It is not a de Polignac number, because 449574781 - 2¹¹ = 449572733 is a prime.

It is a super-2 number, since 2×449574781² = 404234967422395922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449571781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224787390 + 224787391.

It is an arithmetic number, because the mean of its divisors is an integer number (224787391).

Almost surely, 2^449574781 is an apocalyptic number.

It is an amenable number.

449574781 is a deficient number, since it is larger than the sum of its proper divisors (1).

449574781 is an equidigital number, since it uses as much as digits as its factorization.

449574781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The square root of 449574781 is about 21203.1785588859. The cubic root of 449574781 is about 766.0679864532.

The spelling of 449574781 in words is "four hundred forty-nine million, five hundred seventy-four thousand, seven hundred eighty-one".