105843512897 has 4 divisors (see below), whose sum is σ = 105846523860. Its totient is φ = 105840501936.

The previous prime is 105843512861. The next prime is 105843512899. The reversal of 105843512897 is 798215348501.

It is a Cunningham number, because it is equal to 325336²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798215348501 = 1429 ⋅558583169.

It can be written as a sum of positive squares in 2 ways, for example, as 17235488656 + 88608024241 = 131284^2 + 297671^2 .

It is a cyclic number.

It is not a de Polignac number, because 105843512897 - 2⁶ = 105843512833 is a prime.

It is a super-2 number, since 2×105843512897² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105843512899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452122 + ... + 1523267.

It is an arithmetic number, because the mean of its divisors is an integer number (26461630965).

Almost surely, 2^105843512897 is an apocalyptic number.

It is an amenable number.

105843512897 is a deficient number, since it is larger than the sum of its proper divisors (3010963).

105843512897 is an equidigital number, since it uses as much as digits as its factorization.

105843512897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010962.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 105843512897 in words is "one hundred five billion, eight hundred forty-three million, five hundred twelve thousand, eight hundred ninety-seven".