105928391 has 4 divisors (see below), whose sum is σ = 107664984. Its totient is φ = 104191800.

The previous prime is 105928369. The next prime is 105928399. The reversal of 105928391 is 193829501.

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

It is a cyclic number.

It is not a de Polignac number, because 105928391 - 2¹⁴ = 105912007 is a prime.

It is a super-2 number, since 2×105928391² = 22441648039697762, 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 (105928399) 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, 868205 + ... + 868326.

It is an arithmetic number, because the mean of its divisors is an integer number (26916246).

Almost surely, 2^105928391 is an apocalyptic number.

105928391 is a deficient number, since it is larger than the sum of its proper divisors (1736593).

105928391 is an equidigital number, since it uses as much as digits as its factorization.

105928391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736592.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 105928391 is about 10292.1519129869. The cubic root of 105928391 is about 473.1557532738.

The spelling of 105928391 in words is "one hundred five million, nine hundred twenty-eight thousand, three hundred ninety-one".