445944149 has 6 divisors (see below), whose sum is σ = 518751414. Its totient is φ = 382237800.

The previous prime is 445944137. The next prime is 445944157. The reversal of 445944149 is 941449544.

It can be written as a sum of positive squares in only one way, i.e., 438064900 + 7879249 = 20930^2 + 2807^2 .

It is not a de Polignac number, because 445944149 - 2⁴ = 445944133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445934149) 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 5 ways as a sum of consecutive naturals, for example, 4550402 + ... + 4550499.

It is an arithmetic number, because the mean of its divisors is an integer number (86458569).

Almost surely, 2^445944149 is an apocalyptic number.

445944149 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

445944149 is a deficient number, since it is larger than the sum of its proper divisors (72807265).

445944149 is an equidigital number, since it uses as much as digits as its factorization.

445944149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100915 (or 9100908 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 445944149 is about 21117.3897297938. The cubic root of 445944149 is about 764.0002312847. Note that the first 3 decimals are identical.

The spelling of 445944149 in words is "four hundred forty-five million, nine hundred forty-four thousand, one hundred forty-nine".