105354243993 has 4 divisors (see below), whose sum is σ = 140472325328. Its totient is φ = 70236162660.

The previous prime is 105354243989. The next prime is 105354244013. The reversal of 105354243993 is 399342453501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399342453501 = 3 ⋅133114151167.

It is not a de Polignac number, because 105354243993 - 2² = 105354243989 is a prime.

It is a super-2 number, since 2×105354243993² (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 (105354243913) 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 in 3 ways as a sum of consecutive naturals, for example, 17559040663 + ... + 17559040668.

It is an arithmetic number, because the mean of its divisors is an integer number (35118081332).

Almost surely, 2^105354243993 is an apocalyptic number.

It is an amenable number.

105354243993 is a deficient number, since it is larger than the sum of its proper divisors (35118081335).

105354243993 is an equidigital number, since it uses as much as digits as its factorization.

105354243993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35118081334.

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 105354243993 in words is "one hundred five billion, three hundred fifty-four million, two hundred forty-three thousand, nine hundred ninety-three".