105593981 has 2 divisors, whose sum is σ = 105593982. Its totient is φ = 105593980.

The previous prime is 105593951. The next prime is 105594037. The reversal of 105593981 is 189395501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78605956 + 26988025 = 8866^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 105593981 - 2¹⁴ = 105577597 is a prime.

It is a super-2 number, since 2×105593981² = 22300177646856722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105593911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52796990 + 52796991.

It is an arithmetic number, because the mean of its divisors is an integer number (52796991).

Almost surely, 2^105593981 is an apocalyptic number.

It is an amenable number.

105593981 is a deficient number, since it is larger than the sum of its proper divisors (1).

105593981 is an equidigital number, since it uses as much as digits as its factorization.

105593981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 105593981 is about 10275.8931971873. The cubic root of 105593981 is about 472.6573196551.

The spelling of 105593981 in words is "one hundred five million, five hundred ninety-three thousand, nine hundred eighty-one".