105905399 has 2 divisors, whose sum is σ = 105905400. Its totient is φ = 105905398.

The previous prime is 105905389. The next prime is 105905417. The reversal of 105905399 is 993509501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105905399 - 2²⁰ = 104856823 is a prime.

It is a super-2 number, since 2×105905399² = 22431907074698402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105905309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52952699 + 52952700.

It is an arithmetic number, because the mean of its divisors is an integer number (52952700).

Almost surely, 2^105905399 is an apocalyptic number.

105905399 is a deficient number, since it is larger than the sum of its proper divisors (1).

105905399 is an equidigital number, since it uses as much as digits as its factorization.

105905399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54675, while the sum is 41.

The square root of 105905399 is about 10291.0348847917. The cubic root of 105905399 is about 473.1215176165.

The spelling of 105905399 in words is "one hundred five million, nine hundred five thousand, three hundred ninety-nine".