105640043 has 2 divisors, whose sum is σ = 105640044. Its totient is φ = 105640042.

The previous prime is 105640037. The next prime is 105640109. The reversal of 105640043 is 340046501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105640043 - 2⁴ = 105640027 is a prime.

It is a super-2 number, since 2×105640043² = 22319637370083698, which contains 22 as substring.

It is equal to p_6067310 and since 105640043 and 6067310 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (105630043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52820021 + 52820022.

It is an arithmetic number, because the mean of its divisors is an integer number (52820022).

Almost surely, 2^105640043 is an apocalyptic number.

105640043 is a deficient number, since it is larger than the sum of its proper divisors (1).

105640043 is an equidigital number, since it uses as much as digits as its factorization.

105640043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 105640043 is about 10278.1342178432. The cubic root of 105640043 is about 472.7260368815.

Adding to 105640043 its reverse (340046501), we get a palindrome (445686544).

The spelling of 105640043 in words is "one hundred five million, six hundred forty thousand, forty-three".