105309290 has 8 divisors (see below), whose sum is σ = 189556740. Its totient is φ = 42123712.

The previous prime is 105309233. The next prime is 105309299. The reversal of 105309290 is 92903501.

It can be written as a sum of positive squares in 2 ways, for example, as 105042001 + 267289 = 10249^2 + 517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105309290² = 22180093120608200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105309299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5265455 + ... + 5265474.

Almost surely, 2^105309290 is an apocalyptic number.

105309290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105309290 is a deficient number, since it is larger than the sum of its proper divisors (84247450).

105309290 is a wasteful number, since it uses less digits than its factorization.

105309290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530936.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 105309290 is about 10262.0314752977. The cubic root of 105309290 is about 472.2321615952.

The spelling of 105309290 in words is "one hundred five million, three hundred nine thousand, two hundred ninety".