26871617 has 4 divisors (see below), whose sum is σ = 26923716. Its totient is φ = 26819520.

The previous prime is 26871587. The next prime is 26871631. The reversal of 26871617 is 71617862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71617862 = 2 ⋅35808931.

It can be written as a sum of positive squares in 2 ways, for example, as 10863616 + 16008001 = 3296^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 26871617 - 2⁶ = 26871553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26871697) 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, 25268 + ... + 26309.

It is an arithmetic number, because the mean of its divisors is an integer number (6730929).

Almost surely, 2^26871617 is an apocalyptic number.

It is an amenable number.

26871617 is a deficient number, since it is larger than the sum of its proper divisors (52099).

26871617 is an equidigital number, since it uses as much as digits as its factorization.

26871617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52098.

The product of its digits is 28224, while the sum is 38.

The square root of 26871617 is about 5183.7840425697. The cubic root of 26871617 is about 299.5237517662.

The spelling of 26871617 in words is "twenty-six million, eight hundred seventy-one thousand, six hundred seventeen".