105354243989 has 2 divisors, whose sum is σ = 105354243990. Its totient is φ = 105354243988.

The previous prime is 105354243983. The next prime is 105354244013. The reversal of 105354243989 is 989342453501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95836680625 + 9517563364 = 309575^2 + 97558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105354243989 is a prime.

It is a super-2 number, since 2×105354243989² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105354243989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105354243983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52677121994 + 52677121995.

It is an arithmetic number, because the mean of its divisors is an integer number (52677121995).

Almost surely, 2^105354243989 is an apocalyptic number.

It is an amenable number.

105354243989 is a deficient number, since it is larger than the sum of its proper divisors (1).

105354243989 is an equidigital number, since it uses as much as digits as its factorization.

105354243989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 53.

It can be divided in two parts, 10535 and 4243989, that added together give a palindrome (4254524).

The spelling of 105354243989 in words is "one hundred five billion, three hundred fifty-four million, two hundred forty-three thousand, nine hundred eighty-nine".