100313809 has 2 divisors, whose sum is σ = 100313810. Its totient is φ = 100313808.

The previous prime is 100313777. The next prime is 100313827. The reversal of 100313809 is 908313001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89718784 + 10595025 = 9472^2 + 3255^2 .

It is an emirp because it is prime and its reverse (908313001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100313809 - 2⁵ = 100313777 is a prime.

It is not a weakly prime, because it can be changed into another prime (100313849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50156904 + 50156905.

It is an arithmetic number, because the mean of its divisors is an integer number (50156905).

Almost surely, 2^100313809 is an apocalyptic number.

It is an amenable number.

100313809 is a deficient number, since it is larger than the sum of its proper divisors (1).

100313809 is an equidigital number, since it uses as much as digits as its factorization.

100313809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 100313809 is about 10015.6781597653. The cubic root of 100313809 is about 464.6439004888.

The spelling of 100313809 in words is "one hundred million, three hundred thirteen thousand, eight hundred nine".