105919321 has 4 divisors (see below), whose sum is σ = 106224912. Its totient is φ = 105613732.

The previous prime is 105919273. The next prime is 105919361. The reversal of 105919321 is 123919501.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 105919321 - 2⁹ = 105918809 is a prime.

It is a super-2 number, since 2×105919321² = 22437805122202082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105919361) 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, 152275 + ... + 152968.

It is an arithmetic number, because the mean of its divisors is an integer number (26556228).

Almost surely, 2^105919321 is an apocalyptic number.

It is an amenable number.

105919321 is a deficient number, since it is larger than the sum of its proper divisors (305591).

105919321 is an equidigital number, since it uses as much as digits as its factorization.

105919321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305590.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 105919321 is about 10291.7112765565. The cubic root of 105919321 is about 473.1422484110.

The spelling of 105919321 in words is "one hundred five million, nine hundred nineteen thousand, three hundred twenty-one".