449681249 has 2 divisors, whose sum is σ = 449681250. Its totient is φ = 449681248.

The previous prime is 449681237. The next prime is 449681273. The reversal of 449681249 is 942186944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427166224 + 22515025 = 20668^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 449681249 - 2²⁰ = 448632673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (449681299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224840624 + 224840625.

It is an arithmetic number, because the mean of its divisors is an integer number (224840625).

Almost surely, 2^449681249 is an apocalyptic number.

It is an amenable number.

449681249 is a deficient number, since it is larger than the sum of its proper divisors (1).

449681249 is an equidigital number, since it uses as much as digits as its factorization.

449681249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 47.

The square root of 449681249 is about 21205.6890715676. The cubic root of 449681249 is about 766.1284549167.

The spelling of 449681249 in words is "four hundred forty-nine million, six hundred eighty-one thousand, two hundred forty-nine".