105851897 has 4 divisors (see below), whose sum is σ = 107587236. Its totient is φ = 104116560.

The previous prime is 105851891. The next prime is 105851917. The reversal of 105851897 is 798158501.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25999801 + 79852096 = 5099^2 + 8936^2 .

It is a cyclic number.

It is not a de Polignac number, because 105851897 - 2¹⁰ = 105850873 is a prime.

It is a super-2 number, since 2×105851897² = 22409248196997218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105851891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867578 + ... + 867699.

It is an arithmetic number, because the mean of its divisors is an integer number (26896809).

Almost surely, 2^105851897 is an apocalyptic number.

It is an amenable number.

105851897 is a deficient number, since it is larger than the sum of its proper divisors (1735339).

105851897 is an equidigital number, since it uses as much as digits as its factorization.

105851897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735338.

The product of its (nonzero) digits is 100800, while the sum is 44.

The square root of 105851897 is about 10288.4351093837. The cubic root of 105851897 is about 473.0418326289.

The spelling of 105851897 in words is "one hundred five million, eight hundred fifty-one thousand, eight hundred ninety-seven".