26009965 has 4 divisors (see below), whose sum is σ = 31211964. Its totient is φ = 20807968.

The previous prime is 26009947. The next prime is 26009989. The reversal of 26009965 is 56990062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56990062 = 2 ⋅28495031.

It can be written as a sum of positive squares in 2 ways, for example, as 3674889 + 22335076 = 1917^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 26009965 - 2⁵ = 26009933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2600992 + ... + 2601001.

It is an arithmetic number, because the mean of its divisors is an integer number (7802991).

Almost surely, 2^26009965 is an apocalyptic number.

It is an amenable number.

26009965 is a deficient number, since it is larger than the sum of its proper divisors (5201999).

26009965 is an equidigital number, since it uses as much as digits as its factorization.

26009965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201998.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 26009965 is about 5099.9965686263. The cubic root of 26009965 is about 296.2874497928.

The spelling of 26009965 in words is "twenty-six million, nine thousand, nine hundred sixty-five".