105284891 has 4 divisors (see below), whose sum is σ = 105449784. Its totient is φ = 105120000.

The previous prime is 105284887. The next prime is 105284917. The reversal of 105284891 is 198482501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198482501 = 7 ⋅28354643.

It is a cyclic number.

It is not a de Polignac number, because 105284891 - 2² = 105284887 is a prime.

It is a super-2 number, since 2×105284891² = 22169816545763762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105284191) 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, 81485 + ... + 82766.

It is an arithmetic number, because the mean of its divisors is an integer number (26362446).

Almost surely, 2^105284891 is an apocalyptic number.

105284891 is a deficient number, since it is larger than the sum of its proper divisors (164893).

105284891 is an equidigital number, since it uses as much as digits as its factorization.

105284891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164892.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 105284891 is about 10260.8426067258. The cubic root of 105284891 is about 472.1956884520.

The spelling of 105284891 in words is "one hundred five million, two hundred eighty-four thousand, eight hundred ninety-one".