448109591 has 2 divisors, whose sum is σ = 448109592. Its totient is φ = 448109590.

The previous prime is 448109581. The next prime is 448109693. The reversal of 448109591 is 195901844.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 448109591 - 2⁶ = 448109527 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (448109521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224054795 + 224054796.

It is an arithmetic number, because the mean of its divisors is an integer number (224054796).

Almost surely, 2^448109591 is an apocalyptic number.

448109591 is a deficient number, since it is larger than the sum of its proper divisors (1).

448109591 is an equidigital number, since it uses as much as digits as its factorization.

448109591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 448109591 is about 21168.5991742486. The cubic root of 448109591 is about 765.2348608915.

The spelling of 448109591 in words is "four hundred forty-eight million, one hundred nine thousand, five hundred ninety-one".