100944209 has 2 divisors, whose sum is σ = 100944210. Its totient is φ = 100944208.

The previous prime is 100944197. The next prime is 100944241. The reversal of 100944209 is 902449001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95491984 + 5452225 = 9772^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 100944209 - 2²⁴ = 84166993 is a prime.

It is not a weakly prime, because it can be changed into another prime (100944509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50472104 + 50472105.

It is an arithmetic number, because the mean of its divisors is an integer number (50472105).

Almost surely, 2^100944209 is an apocalyptic number.

It is an amenable number.

100944209 is a deficient number, since it is larger than the sum of its proper divisors (1).

100944209 is an equidigital number, since it uses as much as digits as its factorization.

100944209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 100944209 is about 10047.0995317057. The cubic root of 100944209 is about 465.6151860700.

The spelling of 100944209 in words is "one hundred million, nine hundred forty-four thousand, two hundred nine".