449981961 has 16 divisors (see below), whose sum is σ = 704867520. Its totient is φ = 251737920.

The previous prime is 449981947. The next prime is 449981977. The reversal of 449981961 is 169189944.

It is not a de Polignac number, because 449981961 - 2¹⁸ = 449719817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (449981911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524026 + ... + 524883.

It is an arithmetic number, because the mean of its divisors is an integer number (44054220).

Almost surely, 2^449981961 is an apocalyptic number.

It is an amenable number.

449981961 is a deficient number, since it is larger than the sum of its proper divisors (254885559).

449981961 is a wasteful number, since it uses less digits than its factorization.

449981961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048936.

The product of its digits is 559872, while the sum is 51.

The square root of 449981961 is about 21212.7782480278. The cubic root of 449981961 is about 766.2991926598.

The spelling of 449981961 in words is "four hundred forty-nine million, nine hundred eighty-one thousand, nine hundred sixty-one".