105212347 has 2 divisors, whose sum is σ = 105212348. Its totient is φ = 105212346.

The previous prime is 105212323. The next prime is 105212353. The reversal of 105212347 is 743212501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105212347 - 2¹⁵ = 105179579 is a prime.

It is a super-2 number, since 2×105212347² = 22139275922496818, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (105212147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52606173 + 52606174.

It is an arithmetic number, because the mean of its divisors is an integer number (52606174).

Almost surely, 2^105212347 is an apocalyptic number.

105212347 is a deficient number, since it is larger than the sum of its proper divisors (1).

105212347 is an equidigital number, since it uses as much as digits as its factorization.

105212347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 105212347 is about 10257.3070052524. The cubic root of 105212347 is about 472.0872118724.

Adding to 105212347 its reverse (743212501), we get a palindrome (848424848).

The spelling of 105212347 in words is "one hundred five million, two hundred twelve thousand, three hundred forty-seven".