105019423 has 4 divisors (see below), whose sum is σ = 105046128. Its totient is φ = 104992720.

The previous prime is 105019399. The next prime is 105019451. The reversal of 105019423 is 324910501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105019423 is a prime.

It is a super-2 number, since 2×105019423² = 22058158414505858, which 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 (105019493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6163 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (26261532).

Almost surely, 2^105019423 is an apocalyptic number.

105019423 is a deficient number, since it is larger than the sum of its proper divisors (26705).

105019423 is an equidigital number, since it uses as much as digits as its factorization.

105019423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26704.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 105019423 is about 10247.8984674908. The cubic root of 105019423 is about 471.7984856890.

Adding to 105019423 its reverse (324910501), we get a palindrome (429929924).

The spelling of 105019423 in words is "one hundred five million, nineteen thousand, four hundred twenty-three".