448891813 has 2 divisors, whose sum is σ = 448891814. Its totient is φ = 448891812.

The previous prime is 448891801. The next prime is 448891823. The reversal of 448891813 is 318198844.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277622244 + 171269569 = 16662^2 + 13087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-448891813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (448891823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224445906 + 224445907.

It is an arithmetic number, because the mean of its divisors is an integer number (224445907).

Almost surely, 2^448891813 is an apocalyptic number.

It is an amenable number.

448891813 is a deficient number, since it is larger than the sum of its proper divisors (1).

448891813 is an equidigital number, since it uses as much as digits as its factorization.

448891813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

The square root of 448891813 is about 21187.0671165218. The cubic root of 448891813 is about 765.6798677946.

The spelling of 448891813 in words is "four hundred forty-eight million, eight hundred ninety-one thousand, eight hundred thirteen".