445553873 has 2 divisors, whose sum is σ = 445553874. Its totient is φ = 445553872.

The previous prime is 445553869. The next prime is 445553887. The reversal of 445553873 is 378355544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295564864 + 149989009 = 17192^2 + 12247^2 .

It is a cyclic number.

It is not a de Polignac number, because 445553873 - 2² = 445553869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (445553803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222776936 + 222776937.

It is an arithmetic number, because the mean of its divisors is an integer number (222776937).

Almost surely, 2^445553873 is an apocalyptic number.

It is an amenable number.

445553873 is a deficient number, since it is larger than the sum of its proper divisors (1).

445553873 is an equidigital number, since it uses as much as digits as its factorization.

445553873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 44.

The square root of 445553873 is about 21108.1470764253. The cubic root of 445553873 is about 763.7772900782. Note that the first 3 decimals are identical.

The spelling of 445553873 in words is "four hundred forty-five million, five hundred fifty-three thousand, eight hundred seventy-three".