105239143391 has 4 divisors (see below), whose sum is σ = 108868079400. Its totient is φ = 101610207384.

The previous prime is 105239143379. The next prime is 105239143409. The reversal of 105239143391 is 193341932501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193341932501 = 17 ⋅11373054853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105239143391 is a prime.

It is a super-2 number, since 2×105239143391² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105239143351) 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, 1814467961 + ... + 1814468018.

It is an arithmetic number, because the mean of its divisors is an integer number (27217019850).

Almost surely, 2^105239143391 is an apocalyptic number.

105239143391 is a deficient number, since it is larger than the sum of its proper divisors (3628936009).

105239143391 is an equidigital number, since it uses as much as digits as its factorization.

105239143391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3628936008.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 105239143391 in words is "one hundred five billion, two hundred thirty-nine million, one hundred forty-three thousand, three hundred ninety-one".