26091601 has 2 divisors, whose sum is σ = 26091602. Its totient is φ = 26091600.

The previous prime is 26091581. The next prime is 26091613. The reversal of 26091601 is 10619062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 1081600 = 5001^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 26091601 - 2⁷ = 26091473 is a prime.

It is not a weakly prime, because it can be changed into another prime (26091661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13045800 + 13045801.

It is an arithmetic number, because the mean of its divisors is an integer number (13045801).

Almost surely, 2^26091601 is an apocalyptic number.

It is an amenable number.

26091601 is a deficient number, since it is larger than the sum of its proper divisors (1).

26091601 is an equidigital number, since it uses as much as digits as its factorization.

26091601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 26091601 is about 5107.9938331991. The cubic root of 26091601 is about 296.5971062487.

The spelling of 26091601 in words is "twenty-six million, ninety-one thousand, six hundred one".