105666493 has 2 divisors, whose sum is σ = 105666494. Its totient is φ = 105666492.

The previous prime is 105666433. The next prime is 105666499. The reversal of 105666493 is 394666501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75394489 + 30272004 = 8683^2 + 5502^2 .

It is an emirp because it is prime and its reverse (394666501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105666493 - 2⁹ = 105665981 is a prime.

It is a super-2 number, since 2×105666493² = 22330815485838098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105666499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52833246 + 52833247.

It is an arithmetic number, because the mean of its divisors is an integer number (52833247).

Almost surely, 2^105666493 is an apocalyptic number.

It is an amenable number.

105666493 is a deficient number, since it is larger than the sum of its proper divisors (1).

105666493 is an equidigital number, since it uses as much as digits as its factorization.

105666493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 105666493 is about 10279.4208494448. The cubic root of 105666493 is about 472.7654870746.

The spelling of 105666493 in words is "one hundred five million, six hundred sixty-six thousand, four hundred ninety-three".