26879891 has 4 divisors (see below), whose sum is σ = 26956392. Its totient is φ = 26803392.

The previous prime is 26879863. The next prime is 26879899. The reversal of 26879891 is 19897862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19897862 = 2 ⋅9948931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26879891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26879899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37721 + ... + 38426.

It is an arithmetic number, because the mean of its divisors is an integer number (6739098).

Almost surely, 2^26879891 is an apocalyptic number.

26879891 is a deficient number, since it is larger than the sum of its proper divisors (76501).

26879891 is an equidigital number, since it uses as much as digits as its factorization.

26879891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76500.

The product of its digits is 435456, while the sum is 50.

The square root of 26879891 is about 5184.5820467999. The cubic root of 26879891 is about 299.5544905839.

The spelling of 26879891 in words is "twenty-six million, eight hundred seventy-nine thousand, eight hundred ninety-one".