105209386 has 4 divisors (see below), whose sum is σ = 157814082. Its totient is φ = 52604692.

The previous prime is 105209353. The next prime is 105209407. The reversal of 105209386 is 683902501.

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

It can be written as a sum of positive squares in only one way, i.e., 62110161 + 43099225 = 7881^2 + 6565^2 .

It is a super-2 number, since 2×105209386² = 22138029804993992, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 26302345 + ... + 26302348.

Almost surely, 2^105209386 is an apocalyptic number.

105209386 is a deficient number, since it is larger than the sum of its proper divisors (52604696).

105209386 is an equidigital number, since it uses as much as digits as its factorization.

105209386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52604695.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 105209386 is about 10257.1626681066. The cubic root of 105209386 is about 472.0827831674.

The spelling of 105209386 in words is "one hundred five million, two hundred nine thousand, three hundred eighty-six".