105649493 has 4 divisors (see below), whose sum is σ = 106358700. Its totient is φ = 104940288.

The previous prime is 105649483. The next prime is 105649513. The reversal of 105649493 is 394946501.

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 54140164 + 51509329 = 7358^2 + 7177^2 .

It is a cyclic number.

It is not a de Polignac number, because 105649493 - 2⁴ = 105649477 is a prime.

It is a super-2 number, since 2×105649493² = 22323630742314098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105649493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105649403) 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, 354380 + ... + 354677.

It is an arithmetic number, because the mean of its divisors is an integer number (26589675).

Almost surely, 2^105649493 is an apocalyptic number.

It is an amenable number.

105649493 is a deficient number, since it is larger than the sum of its proper divisors (709207).

105649493 is an equidigital number, since it uses as much as digits as its factorization.

105649493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709206.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 105649493 is about 10278.5939213494. The cubic root of 105649493 is about 472.7401323190.

The spelling of 105649493 in words is "one hundred five million, six hundred forty-nine thousand, four hundred ninety-three".