105312091 has 2 divisors, whose sum is σ = 105312092. Its totient is φ = 105312090.

The previous prime is 105312073. The next prime is 105312121. The reversal of 105312091 is 190213501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105312091 - 2¹¹ = 105310043 is a prime.

It is a super-2 number, since 2×105312091² = 22181273021584562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105312061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52656045 + 52656046.

It is an arithmetic number, because the mean of its divisors is an integer number (52656046).

Almost surely, 2^105312091 is an apocalyptic number.

105312091 is a deficient number, since it is larger than the sum of its proper divisors (1).

105312091 is an equidigital number, since it uses as much as digits as its factorization.

105312091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 105312091 is about 10262.1679483431. The cubic root of 105312091 is about 472.2363483438.

Adding to 105312091 its reverse (190213501), we get a palindrome (295525592).

The spelling of 105312091 in words is "one hundred five million, three hundred twelve thousand, ninety-one".