26868649 has 4 divisors (see below), whose sum is σ = 26900164. Its totient is φ = 26837136.

The previous prime is 26868643. The next prime is 26868671. The reversal of 26868649 is 94686862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94686862 = 2 ⋅47343431.

It can be written as a sum of positive squares in 2 ways, for example, as 24324624 + 2544025 = 4932^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 26868649 - 2⁷ = 26868521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26868643) 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, 14442 + ... + 16195.

It is an arithmetic number, because the mean of its divisors is an integer number (6725041).

Almost surely, 2^26868649 is an apocalyptic number.

It is an amenable number.

26868649 is a deficient number, since it is larger than the sum of its proper divisors (31515).

26868649 is an equidigital number, since it uses as much as digits as its factorization.

26868649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31514.

The product of its digits is 995328, while the sum is 49.

The square root of 26868649 is about 5183.4977573064. The cubic root of 26868649 is about 299.5127237830.

The spelling of 26868649 in words is "twenty-six million, eight hundred sixty-eight thousand, six hundred forty-nine".