26905161 has 4 divisors (see below), whose sum is σ = 35873552. Its totient is φ = 17936772.

The previous prime is 26905157. The next prime is 26905171. The reversal of 26905161 is 16150962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26905161 - 2² = 26905157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26905141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4484191 + ... + 4484196.

It is an arithmetic number, because the mean of its divisors is an integer number (8968388).

Almost surely, 2^26905161 is an apocalyptic number.

It is an amenable number.

26905161 is a deficient number, since it is larger than the sum of its proper divisors (8968391).

26905161 is an equidigital number, since it uses as much as digits as its factorization.

26905161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8968390.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 26905161 is about 5187.0185077750. The cubic root of 26905161 is about 299.6483323718.

The spelling of 26905161 in words is "twenty-six million, nine hundred five thousand, one hundred sixty-one".