105973891 has 4 divisors (see below), whose sum is σ = 106782984. Its totient is φ = 105164800.

The previous prime is 105973877. The next prime is 105973909. The reversal of 105973891 is 198379501.

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 105973891 - 2⁹ = 105973379 is a prime.

It is a super-2 number, since 2×105973891² = 22460931147359762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105973831) 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, 404350 + ... + 404611.

It is an arithmetic number, because the mean of its divisors is an integer number (26695746).

Almost surely, 2^105973891 is an apocalyptic number.

105973891 is a deficient number, since it is larger than the sum of its proper divisors (809093).

105973891 is an equidigital number, since it uses as much as digits as its factorization.

105973891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809092.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 105973891 is about 10294.3620977698. The cubic root of 105973891 is about 473.2234893009.

The spelling of 105973891 in words is "one hundred five million, nine hundred seventy-three thousand, eight hundred ninety-one".