100443509 has 2 divisors, whose sum is σ = 100443510. Its totient is φ = 100443508.

The previous prime is 100443479. The next prime is 100443517. The reversal of 100443509 is 905344001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100440484 + 3025 = 10022^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 100443509 - 2¹⁶ = 100377973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100445509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50221754 + 50221755.

It is an arithmetic number, because the mean of its divisors is an integer number (50221755).

Almost surely, 2^100443509 is an apocalyptic number.

It is an amenable number.

100443509 is a deficient number, since it is larger than the sum of its proper divisors (1).

100443509 is an equidigital number, since it uses as much as digits as its factorization.

100443509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 100443509 is about 10022.1509168441. The cubic root of 100443509 is about 464.8440668812.

The spelling of 100443509 in words is "one hundred million, four hundred forty-three thousand, five hundred nine".