26309161 has 2 divisors, whose sum is σ = 26309162. Its totient is φ = 26309160.

The previous prime is 26309131. The next prime is 26309189. The reversal of 26309161 is 16190362.

It is an a-pointer prime, because the next prime (26309189) can be obtained adding 26309161 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 553536 = 5075^2 + 744^2 .

It is a cyclic number.

It is not a de Polignac number, because 26309161 - 2⁹ = 26308649 is a prime.

It is not a weakly prime, because it can be changed into another prime (26309131) 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 as a sum of consecutive naturals, namely, 13154580 + 13154581.

It is an arithmetic number, because the mean of its divisors is an integer number (13154581).

Almost surely, 2^26309161 is an apocalyptic number.

It is an amenable number.

26309161 is a deficient number, since it is larger than the sum of its proper divisors (1).

26309161 is an equidigital number, since it uses as much as digits as its factorization.

26309161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 26309161 is about 5129.2456560395. The cubic root of 26309161 is about 297.4191989212.

The spelling of 26309161 in words is "twenty-six million, three hundred nine thousand, one hundred sixty-one".