105196981 has 4 divisors (see below), whose sum is σ = 108590464. Its totient is φ = 101803500.

The previous prime is 105196961. The next prime is 105196991. The reversal of 105196981 is 189691501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189691501 = 109 ⋅1740289.

It is a cyclic number.

It is not a de Polignac number, because 105196981 - 2¹³ = 105188789 is a prime.

It is a super-2 number, since 2×105196981² = 22132809623028722, 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 (105196921) 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, 1696695 + ... + 1696756.

It is an arithmetic number, because the mean of its divisors is an integer number (27147616).

Almost surely, 2^105196981 is an apocalyptic number.

It is an amenable number.

105196981 is a deficient number, since it is larger than the sum of its proper divisors (3393483).

105196981 is an equidigital number, since it uses as much as digits as its factorization.

105196981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393482.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 105196981 is about 10256.5579508917. The cubic root of 105196981 is about 472.0642283682.

The spelling of 105196981 in words is "one hundred five million, one hundred ninety-six thousand, nine hundred eighty-one".