105682981 has 4 divisors (see below), whose sum is σ = 105719500. Its totient is φ = 105646464.

The previous prime is 105682943. The next prime is 105683009. The reversal of 105682981 is 189286501.

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 96628900 + 9054081 = 9830^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 105682981 - 2⁹ = 105682469 is a prime.

It is a super-2 number, since 2×105682981² = 22337784946092722, 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 (105682481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13506 + ... + 19843.

It is an arithmetic number, because the mean of its divisors is an integer number (26429875).

Almost surely, 2^105682981 is an apocalyptic number.

It is an amenable number.

105682981 is a deficient number, since it is larger than the sum of its proper divisors (36519).

105682981 is an equidigital number, since it uses as much as digits as its factorization.

105682981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36518.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 105682981 is about 10280.2228088695. Note that the first 3 decimals coincide. The cubic root of 105682981 is about 472.7900756070.

The spelling of 105682981 in words is "one hundred five million, six hundred eighty-two thousand, nine hundred eighty-one".