26868643 has 2 divisors, whose sum is σ = 26868644. Its totient is φ = 26868642.

The previous prime is 26868613. The next prime is 26868671. The reversal of 26868643 is 34686862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26868643 - 2⁹ = 26868131 is a prime.

It is a super-2 number, since 2×26868643² = 1443847953322898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26868643.

It is not a weakly prime, because it can be changed into another prime (26868613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13434321 + 13434322.

It is an arithmetic number, because the mean of its divisors is an integer number (13434322).

Almost surely, 2^26868643 is an apocalyptic number.

26868643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26868643 is an equidigital number, since it uses as much as digits as its factorization.

26868643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 43.

The square root of 26868643 is about 5183.4971785465. The cubic root of 26868643 is about 299.5127014884.

The spelling of 26868643 in words is "twenty-six million, eight hundred sixty-eight thousand, six hundred forty-three".