100448009 has 2 divisors, whose sum is σ = 100448010. Its totient is φ = 100448008.

The previous prime is 100447999. The next prime is 100448021. The reversal of 100448009 is 900844001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85969984 + 14478025 = 9272^2 + 3805^2 .

It is an emirp because it is prime and its reverse (900844001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100448009 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 (100448099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50224004 + 50224005.

It is an arithmetic number, because the mean of its divisors is an integer number (50224005).

Almost surely, 2^100448009 is an apocalyptic number.

It is an amenable number.

100448009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100448009 is an equidigital number, since it uses as much as digits as its factorization.

100448009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 100448009 is about 10022.3754170356. The cubic root of 100448009 is about 464.8510086507.

The spelling of 100448009 in words is "one hundred million, four hundred forty-eight thousand, nine".