26191871 has 4 divisors (see below), whose sum is σ = 27330672. Its totient is φ = 25053072.

The previous prime is 26191853. The next prime is 26191873. The reversal of 26191871 is 17819162.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26191871 - 2¹⁸ = 25929727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26191873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569366 + ... + 569411.

It is an arithmetic number, because the mean of its divisors is an integer number (6832668).

Almost surely, 2^26191871 is an apocalyptic number.

26191871 is a deficient number, since it is larger than the sum of its proper divisors (1138801).

26191871 is a wasteful number, since it uses less digits than its factorization.

26191871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138800.

The product of its digits is 6048, while the sum is 35.

The square root of 26191871 is about 5117.7994294423. The cubic root of 26191871 is about 296.9765613884.

The spelling of 26191871 in words is "twenty-six million, one hundred ninety-one thousand, eight hundred seventy-one".