26196409 has 4 divisors (see below), whose sum is σ = 26207716. Its totient is φ = 26185104.

The previous prime is 26196403. The next prime is 26196431. The reversal of 26196409 is 90469162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 24157225 + 2039184 = 4915^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 26196409 - 2⁷ = 26196281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26196403) 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, 774 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (6551929).

Almost surely, 2^26196409 is an apocalyptic number.

It is an amenable number.

26196409 is a deficient number, since it is larger than the sum of its proper divisors (11307).

26196409 is an equidigital number, since it uses as much as digits as its factorization.

26196409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 26196409 is about 5118.2427648559. The cubic root of 26196409 is about 296.9937117708.

The spelling of 26196409 in words is "twenty-six million, one hundred ninety-six thousand, four hundred nine".