105409399 has 4 divisors (see below), whose sum is σ = 106167880. Its totient is φ = 104650920.

The previous prime is 105409361. The next prime is 105409417. The reversal of 105409399 is 993904501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105409399 - 2⁹ = 105408887 is a prime.

It is a super-2 number, since 2×105409399² = 22222282795082402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105409309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379032 + ... + 379309.

It is an arithmetic number, because the mean of its divisors is an integer number (26541970).

Almost surely, 2^105409399 is an apocalyptic number.

105409399 is a deficient number, since it is larger than the sum of its proper divisors (758481).

105409399 is an equidigital number, since it uses as much as digits as its factorization.

105409399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758480.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 105409399 is about 10266.9079571213. The cubic root of 105409399 is about 472.3817518080.

The spelling of 105409399 in words is "one hundred five million, four hundred nine thousand, three hundred ninety-nine".